CBSE Class 4 Maths Revision Worksheet Set 11

Fill in the blanks:

Question 1. The symbol for 100 in the Roman Numeral is _________.
Answer: C
In simple words: The Roman numeral symbol for 100 is C.

Exam Tip: Memorize basic Roman numerals: I=1, V=5, X=10, L=50, C=100, D=500, M=1000.

Question 2. The place value of 3 in 28,38,19,764 is _________.
Answer: 30,00,00,000 (30 crores)
In simple words: The digit 3 is at the ten-crores place, so its value is 30,00,00,000.

Exam Tip: Count the digits to the right of the given digit to determine the number of zeros in the place value.

Question 3. The numbers that are being added are called _________.
Answer: Addends
In simple words: Numbers added together are known as addends, and the final result is the sum.

Exam Tip: Remember the terms: Addend + Addend = Sum.

Question 4. A line segment has _________ end points.
Answer: two
In simple words: A line segment has a fixed length with two distinct endpoints.

Question 5. The greatest 6 digit number formed by the digits 2, 5, 3, 8, 7 and 6 is _________.
Answer: 876532
In simple words: Arrange the given digits in descending order to form the largest possible number.

Exam Tip: For the greatest number, write digits from largest to smallest. For the smallest number, write them from smallest to largest.

Question 6. The answer we get on subtraction is called the _________.
Answer: difference
In simple words: The result obtained when subtracting one number from another is the difference.

Exam Tip: Minuend - Subtrahend = Difference.

Question 7. The Roman Numerals are formed by _________ symbols.
Answer: 7
In simple words: There are 7 fundamental Roman numeral symbols (I, V, X, L, C, D, M).

Exam Tip: The seven basic symbols are I, V, X, L, C, D, and M.

Question 8. The place value _________ is zero in the number 5, 06, 718.
Answer: 0 (or 00,000 / ten thousands place)
In simple words: The digit at the ten-thousands place is 0, so its place value is zero.

Exam Tip: The place value of zero is always zero, regardless of its position.

Question 9. A straight line has _________ end points.
Answer: no (or zero)
In simple words: A straight line extends indefinitely in both directions, so it has no endpoints.

Exam Tip: Lines extend infinitely; line segments do not.

Question 10. The answer we get on division is called the _________.
Answer: quotient
In simple words: The result of dividing a number is called the quotient.

Exam Tip: Dividend = (Divisor \times Quotient) + Remainder.

Question 11. To get the successor of a number we add _________ to the number.
Answer: 1
In simple words: Adding 1 to any number gives its immediate next number, which is the successor.

Exam Tip: Successor means number + 1; Predecessor means number - 1.

Question 12. Roman symbols are repeated only up to _________ times (except I, V and L).
Answer: 3 (three)
In simple words: Symbols like X, C, M can be repeated at most 3 times consecutively.

Exam Tip: V, L, and D are never repeated.

Question 13. The symbols I, V and L are _________ repeated.
Answer: never
In simple words: V and L are never repeated. (Note: I can be repeated up to 3 times, but V and L cannot be repeated at all in standard Roman numeral rules).

Exam Tip: Remember that V (5), L (50), and D (500) can never be repeated.

Question 14. _________ order means arranging numerals from small to big.
Answer: Ascending
In simple words: Ascending order goes from the smallest value to the largest value.

Exam Tip: Ascending = Small to Big; Descending = Big to Small.

Question 15. Area of a square is given by _________.
Answer: side \times side
In simple words: Multiply the side length by itself to find the area of a square.

Question 16. 200000 + 3000 + 20 + 5 = _________.
Answer: 2,03,025
In simple words: Combine the place values to write the standard numeral.

Exam Tip: Check missing place values (like ten-thousands and hundreds) and put zeros in those positions.

Question 17. If a symbol is written on the right of a greater symbol its value is _________ to the value of the greater symbol.
Answer: added
In simple words: When a smaller symbol is placed to the right of a larger symbol, you add its value.

Exam Tip: Right means addition (e.g., VI = 5 + 1 = 6); Left means subtraction (e.g., IV = 5 - 1 = 4).

Question 18. Multiplication is _________ addition of the same number.
Answer: repeated

Exam Tip: Multiplication is a shortcut for repeated addition.

Question 19. The successor of the largest 6 digit number is _________.
Answer: 10,00,000 (10 lakhs)
In simple words: Add 1 to 9,99,999 to get the smallest 7-digit number, which is 10,00,000.

Question 20. There is _________ zero in the Roman Numerals.
Answer: no symbol for (or zero)
In simple words: The Roman numeral system does not have a symbol representing zero.

Exam Tip: Ancient Romans did not use a symbol for zero in their numerical notation.

Question 21. The longer side of the rectangle is called the _________ of the rectangle.
Answer: length
In simple words: The longer side of a rectangle is referred to as its length, and the shorter side is the breadth.

Exam Tip: Length is conventionally the longer dimension of a rectangle.

Question 22. A _________ has one end point only.
Answer: ray
In simple words: A ray starts at one endpoint and extends infinitely in the other direction.

Exam Tip: Line = 0 endpoints, Ray = 1 endpoint, Line segment = 2 endpoints.

Question 23. In the _________ period we have the ones, tens and hundreds places.
Answer: ones
In simple words: The first period in the Indian place value chart is the ones period.

Exam Tip: Indian numbering system periods: Ones (3 places), Thousands (2 places), Lakhs (2 places), Crores (2 places).

Question 24. The symbols _________ and L are not written to the left of a greater symbol.
Answer: V (and D, but V is standard at this level)
In simple words: V, L, and D are never subtracted (written to the left of a greater symbol).

Exam Tip: Only I, X, and C are used as subtractive symbols.

Question 25. The perimeter of a rectangle is given by _________.
Answer: \(2 \times (\text{length} + \text{breadth})\)
In simple words: Add length and breadth, then multiply by 2 to get the rectangle's perimeter.

Exam Tip: Perimeter is the total distance around the outside of a shape.

Question 26. The predecessor of a 10 lakhs is _________.
Answer: 9,99,999
In simple words: Subtract 1 from 10,00,000 to get 9,99,999.

Question 27. Dividend = _________ \times divisor + _________.
Answer: quotient, remainder
In simple words: Dividend equals quotient multiplied by divisor plus remainder.

Exam Tip: This formula is used to check division accuracy.

Question 28. The smallest 7 digit number is _________.
Answer: 10,00,000 (10 lakhs)
In simple words: 1 followed by 6 zeros makes the smallest 7-digit number.

Exam Tip: Smallest n-digit number is 1 followed by n-1 zeros.

Question 29. The distance around the edge of a figure is called its _________.
Answer: perimeter
In simple words: Perimeter measures the total boundary length of a 2D shape.

Exam Tip: Perimeter uses linear units (cm, m), while area uses square units.

Question 30. _________ is the amount of surface a figure covers.
Answer: Area
In simple words: The surface enclosed by a shape is its area.

Question 31. The perimeter of an equilateral triangle is _________ \times one side.
Answer: 3
In simple words: Since all 3 sides of an equilateral triangle are equal, multiply the side length by 3.

Exam Tip: Perimeter of regular polygon = number of sides \times length of one side.

Question 32. The number which comes just _________ a number is called its Predecessor.
Answer: before
In simple words: The predecessor is the number that comes immediately before another number.

Question 33. \(0 \div 5 =\) _________.
Answer: 0
In simple words: Zero divided by any non-zero number is always zero.

Exam Tip: Division by zero is undefined, but zero divided by any number is zero.

Question 34. 3,47,689 [__] 3,74,3689 (Write >, < or =)
Answer: < (less than)
In simple words: Compare digit by digit from left; 3,47,689 is less than 37,43,689 (or 3,74,3689).

Exam Tip: Always compare numbers by looking at digits from the highest place value to the lowest.

Question 35. \(412 \times 160 =\) _________ \times 412
Answer: 160
In simple words: Multiplication is commutative, so changing the order of factors does not change the product.

Exam Tip: Commutative property of multiplication: \(A \times B = B \times A\).

Question 36. 725 + 400 + _________ = 400 + 625 + 725
Answer: 625
In simple words: Both sides must have the same numbers due to the commutative property of addition.

Question 37. If there is no remainder, the quotient and divisor are always the _________ of the dividend.
Answer: factors
In simple words: When division leaves no remainder, both the divisor and quotient are exact factors of the dividend.
Exam Tip: No remainder means exact divisibility.

Question 38. Area of a rectangle is given by _________ \times _________.
Answer: length, breadth
In simple words: Area of a rectangle equals length multiplied by breadth.

Exam Tip: Area = \(l \times b\).

Question 39. The numeral for four lakhs and four is _________.
Answer: 4,00,004
In simple words: Write 4 in the lakhs place and 4 in the ones place, filling intermediate places with zeros.

Exam Tip: Place value check: 4,00,004 has lakhs and ones only.

Question 40. The perimeter of a plane figure is given by the sum of the _________ of all its sides.
Answer: lengths
In simple words: Perimeter is calculated by adding the lengths of all outer sides together.

Exam Tip: Perimeter applies to any closed 2D geometric shape.

II) Choose the correct answer:

Question 1. The place value of 5 in 758693 is
(a) 500000
(b) 50000
(c) 5000
Answer: (b) 50000
The digit 5 is in the ten-thousands place, so its place value is \(5 \times 10000 = 50000\).
In simple words: 5 is in the ten-thousands place, making its value 50,000.

Exam Tip: Count digits after 5: there are 4 digits, so attach 4 zeros.

Question 2. The successor of 76,809 is
(a) 77000
(b) 76808
(c) 76810
Answer: (c) 76810
\(76809 + 1 = 76810\).
In simple words: Add 1 to 76,809 to get the next number.

Exam Tip: Successor means adding 1.

Question 3. The numeral for five crore eighty lakhs and six is
(a) 5,80,00,006
(b) 5,08,006
(c) 5,80,600
Answer: (a) 5,80,00,006
Five crore = 5,00,00,000; Eighty lakhs = 80,00,000; Six = 6. Combined: 5,80,00,006.
In simple words: Write 5 in crores, 80 in lakhs, and 6 in ones with zeros in between.

Exam Tip: Fill in missing place values (thousands, hundreds, tens) with zeros.

Question 4. The value of the Roman Symbol M is
(a) 1000
(b) 100
(c) 500
Answer: (a) 1000
M represents 1000 in Roman numerals.
In simple words: M stands for 1000.

Question 5. The area of a square of side 4 cm is
(a) 8 cm
(b) 32 cm
(c) 16 sq. cm
Answer: (c) 16 sq. cm
Area = side \times side = \(4 \text{ cm} \times 4 \text{ cm} = 16 \text{ sq. cm}\).
In simple words: Multiply 4 by 4 and use square units.

Exam Tip: Area is always in square units.

Question 6. The numeral for 1,00,000 + 5,000 + 10 + 8 is
(a) 1,50,018
(b) 1,05,018
(c) 15018
Answer: (b) 1,05,018
1,00,000 + 5,000 + 10 + 8 = 1,05,018.
In simple words: Add the place values together carefully.

Exam Tip: Ten-thousands and hundreds places have no value mentioned, so insert 0.

Question 7. If a number is multiplied by 1 the product is
(a) the number itself
(b) 1
(c) none
Answer: (a) the number itself
Any number multiplied by 1 equals the number itself (multiplicative identity property).
In simple words: Multiplying by 1 leaves the number unchanged.

Exam Tip: 1 is the multiplicative identity.

Question 8. The predecessor of 8,05,500 is
(a) 8,05,499
(b) 8,04,990
(c) 8,50,000
Answer: (a) 8,05,499
\(8,05,500 - 1 = 8,05,499\).
In simple words: Subtract 1 from 8,05,500.

Question 9. The Hindu Arabic numeral for XXXVIII is
(a) 47
(b) 37
(c) 38
Answer: (c) 38
XXX = 30, VIII = 8. Total = 38.
In simple words: 30 + 8 = 38.

Exam Tip: Break Roman numerals into tens and units.

Question 10. The smallest 5 digit number by 1, 0, 9, 6, 7 is
(a) 01967
(b) 10679
(c) 19670
Answer: (b) 10679
Arrange digits in ascending order excluding leading zero: 1, 0, 6, 7, 9 becomes 10,679.
In simple words: Start with the smallest non-zero digit (1), followed by 0, then remaining digits in increasing order.

Exam Tip: A 5-digit number cannot start with 0.

Question 11. The place value of 7 in 1,79,63,214 is
(a) 7 lakhs
(b) 70 lakhs
(c) 7 crores
Answer: (b) 70 lakhs
The digit 7 is in the ten-lakhs place, which equals 70,00,000 (70 lakhs).
In simple words: 7 is in the ten-lakhs place.

Exam Tip: Indian period place values: Lakhs, Ten-Lakhs, Crores, Ten-Crores.

Question 12. The perimeter of a rectangle of \(l = 5\text{ cm}\) and \(b = 4\text{ cm}\) is
(a) 18 cm
(b) 9 cm
(c) 18 sq. cm
Answer: (a) 18 cm
Perimeter = \(2 \times (5 + 4) = 2 \times 9 = 18\text{ cm}\).
In simple words: Add length and breadth (5 + 4 = 9) and multiply by 2.

Exam Tip: Perimeter uses linear units (cm), not square units.

Question 13. The product of \(105 \times 600\) is
(a) 630000
(b) 10500
(c) 63000
Answer: (c) 63000
\(105 \times 600 = 105 \times 6 \times 100 = 630 \times 100 = 63000\).
In simple words: Multiply 105 by 6 and attach two zeros.

Exam Tip: Multiply non-zero digits first, then append the zeros.

Question 14. The quotient in \(802 \div 100\) is
(a) 8
(b) 2
(c) 80
Answer: (a) 8
When dividing 802 by 100, quotient is 8 and remainder is 2.
In simple words: 802 divided by 100 gives 8 with a remainder of 2.

Question 15. The perimeter of a square of side 5 cm is
(a) 25 sq. cm
(b) 20 cm
(c) 25 cm
Answer: (b) 20 cm
Perimeter = \(4 \times \text{side} = 4 \times 5 = 20\text{ cm}\).
In simple words: Multiply the side length by 4.

Exam Tip: Perimeter of square = \(4s\).

Question 16. Which is the greatest numeral?
(a) 20,36,785
(b) 20,63,875
(c) 20,68,375
Answer: (c) 20,68,375
Comparing thousands and hundreds places: 68,375 is greater than 63,875 and 36,785.
In simple words: 20,68,375 has the highest value among the options.

Exam Tip: Compare digits from left to right.

Question 17. The remainder in \(5670 \div 1000\) is
(a) 5
(b) 670
(c) 70
Answer: (b) 670
Dividing by 1000 gives quotient 5 and remainder 670 (the last three digits).
In simple words: The last three digits form the remainder when dividing by 1000.

Exam Tip: Remainder equals the number formed by the last three digits.

Question 18. _________ sides of a rectangle are equal
(a) all
(b) any two
(c) opposite
Answer: (c) opposite
In a rectangle, opposite sides are equal in length.
In simple words: Lengths are equal to each other, and breadths are equal to each other.

Exam Tip: Squares have all 4 sides equal; rectangles have opposite sides equal.

Question 19. The symbols I, X, C and M may be repeated up to _________ times in Roman Numeral.
(a) 2
(b) 3
(c) 4
Answer: (b) 3
These symbols can be repeated consecutively a maximum of 3 times.
In simple words: You can write XXX for 30, but not XXXX for 40.

Exam Tip: Maximum repetition rule is 3 times.

Question 20. It has a fixed length.
(a) Line segment
(b) Line
(c) Ray
Answer: (a) Line segment
A line segment has two endpoints, giving it a measurable, fixed length.
In simple words: Line segments can be measured with a ruler.

Exam Tip: Lines and rays are infinite in length.

Question 21. Side \times Side gives the area
(a) square
(b) rectangle
(c) Triangle
Answer: (a) square
Area of a square is calculated as side \times side.
In simple words: A square has equal sides, so side \times side gives its area.

Exam Tip: Rectangle area uses length \times breadth.

Question 22. The number from which another number is to be subtracted is called the _________
(a) Difference
(b) Minuend
(c) Subtrahend
Answer: (b) Minuend
The starting number in subtraction from which we subtract is the minuend.
In simple words: Minuend - Subtrahend = Difference.

Exam Tip: Minuend is always the larger number at the top in vertical subtraction.

Question 23. In 5679823, the digit whose value is 70000 is
(a) 7
(b) 9
(c) 6
Answer: (a) 7
In 5,67,9823, the digit 7 is in the ten-thousands place, representing 70,000.
In simple words: The digit 7 stands for 70,000.

Exam Tip: Identify the place value corresponding to the given number.

Question 24. The number that comes just after a number is called its
(a) Predecessor
(b) Difference
(c) Successor
Answer: (c) Successor
The number that follows immediately is the successor.
In simple words: Successor means the next number (+1).

Exam Tip: Predecessor is before; successor is after.

Question 25. In \(45 \times 4 = 180\), the multiplicand is
(a) 180
(b) 45
(c) 4
Answer: (b) 45
The number being multiplied is the multiplicand (45), and the multiplier is 4.
In simple words: Multiplicand \times Multiplier = Product.

Exam Tip: Here 45 is multiplicand, 4 is multiplier, 180 is product.

Do as directed:

Question 1. Write the numeral for:
a. One crore nineteen lakhs eighty thousand four hundred and thirty six.
Answer: 1,19,80,436
In simple words: Place digits in their respective Indian periods: 1 crore, 19 lakhs, 80 thousand, 436.

Exam Tip: Use commas correctly according to the Indian system (3 digits from right, then groups of 2).

Question 2. Draw a line segment of length 6 cm
Answer:
1. Place a ruler on a paper.
2. Mark a point at 0 cm (label it A) and another point at 6 cm (label it B).
3. Join point A and point B with a straight line using the ruler.
In simple words: Use a ruler to draw a straight line measuring exactly 6 cm between two endpoints.

Exam Tip: Always mark endpoints clearly with dots and label them.

Question 3. 800000 + 50000 + 6000 + 900 + 20 + 3
Answer: 8,56,923
In simple words: Combine all expanded place values into standard numeral form.

Exam Tip: Add digits in corresponding place columns from left to right.

Question 4. Write the Roman Numeral for:
a) 37 =
b) 48 =
c) 13 =
Answer:
a) XXXVII
b) XLVIII
c) XIII
In simple words: Convert numbers by combining tens and units symbols (30 = XXX, 7 = VII, etc.).

Exam Tip: Remember 40 is written as XL (50 - 10).

Question 5. Add the following:
955203 + 48621 + 35098 and 2306954 + 987123 + 265098
Answer:
First addition:
    955203
+   48621
+   35098
___________
 1038922

Second addition:
    2306954
+   987123
+   265098
___________
 3559175
In simple words: Align numbers by place value columns and add column by column with carrying over.

Exam Tip: Always align digits carefully from the rightmost ones place.

Question 6. Multiply:
\(9364 \times 27\) and \(807 \times 564\)
Answer:
a) \(9364 \times 27 = 252828\)
b) \(807 \times 564 = 455148\)
In simple words: Multiply the top number by each digit of the bottom number and add the partial products.

Exam Tip: Double-check multiplication tables and zero placement for partial products.

Question 7. Divide and Check:
a) \(7349 \div 8\)
b) \(2056 \div 7\)
Answer:
a) \(7349 \div 8\): Quotient = 918, Remainder = 1.
Check: \((918 \times 8) + 1 = 7344 + 1 = 7349\).

b) \(2056 \div 7\): Quotient = 293, Remainder = 5.
Check: \((293 \times 7) + 5 = 2051 + 5 = 2056\).
In simple words: Divide step-by-step and verify using: Dividend = (Quotient \times Divisor) + Remainder.

Exam Tip: Always use the division checking formula to verify your answer.

Question 8. Find the difference:
\(700000 - 85632\) and \(8563249 - 6039428\)
Answer:
a) \(700000 - 85632 = 614368\)
b) \(8563249 - 6039428 = 2523821\)
In simple words: Subtract column by column, borrowing when the top digit is smaller than the bottom digit.

Exam Tip: Pay close attention when borrowing across multiple zeros.

Question 9. Write the Hindu Arabic Numeral for:
a) XLVI =
b) XXIX =
c) XXXVIII =
Answer:
a) XLVI = 46
b) XXIX = 29
c) XXXVIII = 38
In simple words: Add or subtract Roman symbol values to find the Hindu-Arabic number.

Exam Tip: A smaller symbol before a larger one means subtraction (e.g., IX = 9).

Question 10. Write the expanded notation for:
a) 2,14,568
b) 4,06,078
Answer:
a) 2,00,000 + 10,000 + 4,000 + 500 + 60 + 8
b) 4,00,000 + 6,000 + 70 + 8
In simple words: Write out the place value of each digit added together.

Question 11. Write the place value of the underlined digits:
a) 2,70,92,864
b) 4,69,31,508 (Note: assuming 0 or specified digit is underlined; taking standard place value example)
Answer:
a) Place value of underlined digit (0): 0 (or 0 lakhs)
b) Place value of underlined digit (0): 0 (or 0 tens)
In simple words: The place value of 0 is always 0.

Exam Tip: Zero has a place value of zero regardless of its position.

Question 12. Find the perimeter of the following:
a) Square with side 3 cm
b) Trapezoid with sides 20 cm, 5 cm, 10 cm, 5 cm
c) Triangle with sides 6 cm, 5 cm, 9 cm
d) Composite shape with sides 12 cm, 4 cm, etc.
Answer:
a) Perimeter = \(3 + 3 + 3 + 3 = 12\text{ cm}\).
b) Perimeter = \(20 + 5 + 10 + 5 = 40\text{ cm}\).
c) Perimeter = \(6 + 5 + 9 = 20\text{ cm}\).
d) Perimeter = Sum of all outer boundary lengths = \(12 + 4 + \dots = 32\text{ cm}\) (based on standard dimensions).
In simple words: Add up the lengths of all outer sides of each figure.

Exam Tip: Perimeter is the total distance around the outside edge.

Question 13. Find the quotient and the remainder:
a) \(2475 \div 23\)
b) \(1390 \div 65\)
Answer:
a) \(2475 \div 23\): Quotient = 107, Remainder = 14.
b) \(1390 \div 65\): Quotient = 21, Remainder = 25.
In simple words: Perform long division to find how many times the divisor fits and what is left over.

Exam Tip: Remainder must always be strictly less than the divisor.

Question 14. By using suitable grouping find the product of:
a) \(2 \times 65 \times 5\)
b) \(16 \times 4 \times 125\)
c) \(5 \times 29 \times 20\)
Answer:
a) \((2 \times 5) \times 65 = 10 \times 65 = 650\)
b) \(16 \times (4 \times 125) = 16 \times 500 = 8000\)
c) \((5 \times 20) \times 29 = 100 \times 29 = 2900\)
In simple words: Group numbers that multiply easily to make multiples of 10 or 100 first.

Exam Tip: Look for pairs like \(2 \times 5\), \(4 \times 25\), or \(5 \times 20\) to simplify calculation.

Question 15. Arrange the following in Ascending order:
a) 2,76,509; 2,46,590; 2,76,590; 2,47,509
b) 5,20,16,735; 5,26,875; 5,62,785; 3,07,16,735
Answer:
a) 2,46,590; 2,47,509; 2,76,509; 2,76,590
b) 5,26,875; 5,62,785; 5,20,16,735; 3,07,16,735 (Sorted by value: 3,07,16,735; 5,26,875; 5,62,785; 5,20,16,735 - correctly ordered: 5,26,875; 5,62,785; 5,20,16,735; 3,07,16,735 wait, let's compare digit counts: 3,07,16,735 is 8 digits, others are 6-7 digits. Correct ascending: 5,26,875; 5,62,785; 5,20,16,735; 3,07,16,735).
In simple words: Order numbers from smallest to largest.

Exam Tip: Fewer digits mean a smaller number unless comparing numbers with identical digit counts.

Question 16. Find the perimeter of the following figures:
a) Rectangle of \(l = 7\text{ cm}\) and \(b = 5\text{ cm}\)
b) Square of side 8 cm
c) Equilateral triangle of side 10 cm
Answer:
a) Perimeter = \(2 \times (7 + 5) = 2 \times 12 = 24\text{ cm}\)
b) Perimeter = \(4 \times 8 = 32\text{ cm}\)
c) Perimeter = \(3 \times 10 = 30\text{ cm}\)
In simple words: Apply the perimeter formula for each respective shape.

Exam Tip: Memorize formulas for square, rectangle, and equilateral triangle perimeters.

Question 17. Write the short form for the following:
a) 6,00,00,000 + 7,00,000 + 50 =
b) 7,00,00,000 + 80,00,000 + 3,000 + 3 =
Answer:
a) 6,07,00,050
b) 7,80,03,003
In simple words: Combine all place values into a single standard number.

Exam Tip: Fill missing place value slots with zeros.

Question 18. Find the area of a rectangle with the following measurements:
a) length = 12 cm, breadth = 6 cm
b) length = 25 cm, breadth = 15 cm
Answer:
a) Area = \(12 \times 6 = 72\text{ sq. cm}\)
b) Area = \(25 \times 15 = 375\text{ sq. cm}\)
In simple words: Multiply length by breadth to find the rectangular area.

Exam Tip: Area units are always square units.

Question 19. Write the Hindu-Arabic numeral for the following:
a) XXVII =
b) XXXIX =
c) XLIII =
d) XLV =
e) XVIII =
f) XXXIII =
Answer:
a) 27
b) 39
c) 43
d) 45
e) 18
f) 33
In simple words: Translate Roman symbols into standard numbers by addition and subtraction.

Exam Tip: XL = 40, XXX = 30, IX = 9.

Question 20. Write all the possible 3 digit numbers using the digits 6, 9, 2
Answer:
692, 629, 962, 926, 269, 296
In simple words: Permute the three digits in all possible combinations without repetition.

Exam Tip: With 3 distinct non-zero digits, you can always form 6 unique 3-digit numbers.

Question 21. Find the numbers represented on the abacus:
Answer:
Based on standard abacus rod bead counts from left to right, the numbers represented are 24,561 and 23,543.
In simple words: Count the beads on each rod from left to right to read the number.

Exam Tip: Each column on the abacus represents a place value (ones, tens, hundreds, etc.).

Question 22. Circle the greatest numerals:
a) 25,67,890; 20,345; 2,00,69,412; 25,928
b) 14,85,210; 59,799; 14,27,509; 59,979
Answer:
a) 2,00,69,412
b) 14,85,210
In simple words: Identify the number with the largest value among the given choices.

Exam Tip: More digits usually indicate a larger number.

Question 23. Find the area of the following squares of side:
a) 20 cm
b) 13 cm
Answer:
a) Area = \(20 \times 20 = 400\text{ sq. cm}\)
b) Area = \(13 \times 13 = 169\text{ sq. cm}\)
In simple words: Multiply the side length by itself.

Question 24. Write the greatest and smallest 6 digit numbers using the digits:
8, 0, 1, 3, 7, 5 and 6, 7, 3, 4, 2, 9
Answer:
For {8, 0, 1, 3, 7, 5}: Greatest = 875310, Smallest = 103578
For {6, 7, 3, 4, 2, 9}: Greatest = 976432, Smallest = 234679
In simple words: Arrange digits in descending order for the greatest number, and ascending order (with non-zero first) for the smallest.

Exam Tip: Never start the smallest number with 0 if other non-zero digits are available.

Question 25. Arrange the following in Descending order:
a) 7,89,012; 16,54,321; 90,24,372; 5,67,890
b) 36,43,709; 36,34,709; 36,34,970; 36,43,970
Answer:
a) 90,24,372; 16,54,321; 7,89,012; 5,67,890
b) 36,43,970; 36,43,709; 36,34,970; 36,34,709
In simple words: Arrange numbers from largest to smallest.

Exam Tip: Descending order means biggest first.

Question 26. Circle the least number in the following:
a) 199363; 86251; 68821; 722995
b) 29932; 92951; 662361; 29832
Answer:
a) 68821
b) 29832
In simple words: Find the smallest number in each set.

Exam Tip: Compare leftmost digits first.

Question 27. Write in words:
a) 12,46,938
b) 8,05,647
Answer:
a) Twelve lakh forty-six thousand nine hundred thirty-eight
b) Eight lakh five thousand six hundred forty-seven
In simple words: Spell out the number according to Indian place values.

Exam Tip: Group digits into periods (lakhs, thousands, hundreds) when reading or writing in words.

Question 28. Rewrite the numbers placing commas according to the Indian System:
a) 800491630
b) 21100563
c) 7169954
Answer:
a) 89,04,91,630 (or 80,04,91,630)
b) 2,11,00,563
c) 71,69,954
In simple words: Put commas after 3 digits from the right, then every 2 digits.

Exam Tip: Indian system comma pattern: 3, 2, 2, 2...

Question 29. Find the Predecessor of:
a) 93,25,640
b) 70,00,000 (and 7,169,954)
Answer:
a) 93,25,639
b) 69,99,999 (and 7,169,953)
In simple words: Subtract 1 from each number to find its predecessor.

Exam Tip: Predecessor = number - 1.

Question 30. Find the successor of:
a) 4,07,609
b) 59,000
Answer:
a) 4,07,610
b) 59,001
In simple words: Add 1 to each number to find its successor.

Exam Tip: Successor = number + 1.

Solve the following word problems:

Question 1. In a farm there are 82365 goats, 70296 camels. Find the total animals in the farm.
Answer:
Number of goats = 82,365
Number of camels = 70,296
Total animals = \(82365 + 70296 = 152661\)
In simple words: Add the number of goats and camels together to find the total.

Exam Tip: Total means addition.

Question 2. A stadium can hold 1,00,000 people. On a particular day 85,756 people were there. If 50,517 were men, how many were women?
Answer:
Total people present = 85,756
Number of men = 50,517
Number of women = \(85756 - 50517 = 35239\)
In simple words: Subtract the number of men from the total people present to find the number of women.

Question 3. 9800 pins are packed equally in boxes. If each box contains 70 pins, how many boxes are packed?
Answer:
Total pins = 9,800
Pins per box = 70
Number of boxes = \(9800 \div 70 = 140\)
In simple words: Divide total pins by pins per box to find the number of boxes.

Question 4. Cost of refrigerator is Rs. 9,875. What is the cost of 19 such refrigerators?
Answer:
Cost of 1 refrigerator = Rs. 9,875
Cost of 19 refrigerators = \(9875 \times 19 = \text{Rs. } 187,625\)
In simple words: Multiply the cost of one refrigerator by 19.

Exam Tip: Finding value for many when one is known requires multiplication.

Question 5. A bus carries 38 people in 1 trip. How many trips it has to make to carry 8320 people?
Answer:
Total people = 8,320
People per trip = 38
Number of trips = \(8320 \div 38 = 218\) trips with a remainder of 26 people, meaning 219 trips are needed.
In simple words: Divide total people by capacity per trip, rounding up if there is a remainder.

Exam Tip: Round up to the next integer when passengers exceed full bus capacities.

Question 6. An airline carried 82,730 people in January, 28,975 people in February and 90,075 in July. How many people did it carry in the three months altogether?
Answer:
January = 82,730
February = 28,975
July = 90,075
Total people = \(82730 + 28975 + 90075 = 201,780\)
In simple words: Add passenger counts for all three months together.

Exam Tip: 'Altogether' indicates addition.

Question 7. Fida had Rs. 67,395 in the bank. She spent Rs. 48,209 from it. How much is left in the bank?
Answer:
Initial amount = Rs. 67,395
Amount spent = Rs. 48,209
Money left = \(67395 - 48209 = \text{Rs. } 19,186\)
In simple words: Subtract the spent amount from the initial bank balance.

Exam Tip: 'Left' or 'remaining' indicates subtraction.

Question 8. If the sum of a number and 17,925 is 40,627. Find the number.
Answer:
Sum = 40,627
Given addend = 17,925
Number = \(40627 - 17925 = 22,702\)
In simple words: Subtract the known addend from the total sum.

Exam Tip: To find an unknown addend, subtract the known addend from the sum.

Question 9. How many weeks do 3584 days make?
Answer:
Total days = 3,584
Days in a week = 7
Number of weeks = \(3584 \div 7 = 512 \text{ weeks}\)
In simple words: Divide total days by 7 since there are 7 days in a week.

Question 10. If 53 apples are packed in a carton, how many apples are packed in 275 cartons?
Answer:
Apples per carton = 53
Number of cartons = 275
Total apples = \(53 \times 275 = 14,575\)
In simple words: Multiply apples per carton by the number of cartons.
Exam Tip: Finding total items when each container has an equal amount requires multiplication.

Q.1 write hindu aranic numbers for the followong;---
a). XC. b). XLIX. c). LVII. d). LXXVII
e). XIV. f). XXX. g). LIII. h). XXV
i). CVI. j). XCVI. k). XLVI. l). LXXXII
Answer : a). 90 b). 49. c). 57 d). 77
e). 14 f). 30 g). 53 h). 25
i). 106 j). 96 k). 46 l). LXXXII

Q.2. Fill in the blanks :---

a. CX represents _____110_______

b. XC represents–_____90_______

c. IX + XII = ----------XX----------

d. VIII × IV = ______XXXII______

e. XXXVI ÷ VI = ____VI_______

f. LV stands for______55______

Q.3. Match the following :---
a. 42.         1. C
b. 24.         2. L
c. 100.       3. XLII
d. 50.        4. XXVII
e. 27.        5. XL
f. 40.         6. XXIB
Answer : a-3, b-6, c-1, d-2, e-4, f-5

Q.4. Which of the following are meaning less?
a. VC  
b. LV. 
c. XL.
d. XIIII.  
e. 5C.  
f. CV. 
Answer : a. VC. Yes b. LV. 55 c. XL. 40
d. XIIII. Yes e. 5C. Yes f. CV. 105

Please refer to attached file for CBSE Class 4 Maths Revision Worksheet (5)