CBSE Class 3 Mathematics Revision Worksheet Set 21

Page 1

Question I. Fill in the blanks
1. The smallest 1 digit number is ___________.
2. The largest 1 digit number is ___________.
3. The smallest two digit number is ___________.
4. The largest two digit number is ___________.
5. The smallest three digit number is ___________.
6. The largest three digit number is ___________.
7. The smallest four digit number is ___________.
8. The largest four digit number is ___________.
9. 1 Ten = ___________ ones.
10. 1 Hundred = ___________ Tens.
11. 10 Hundreds = ___________ Thousand
12. The smallest 5 digit number is ___________.
13. A number written in figures is the ___________.
14. A number written in words is the ___________.
15. The successor of 999 is ___________.
16. The predecessor of 7390 is ___________.
17. The place value of 5 in 6538 is ___________.
18. The place value of zero is ___________.
19. The face value of 7 in 6378 is ___________.
20. The number just before 2000 is ___________.
21. A number that comes just after a given number is called its ______________.
22. The successor of a number is ___________ greater than the number.
23. A number that comes just before a given number is called its _____________.
24. The predecessor of a number is ___________ less than the number.
25. The successor of 3999 is ___________.
Answer:
1. 1
2. 9
3. 10
4. 99
5. 100
6. 999
7. 1000
8. 9999
9. 10
10. 10
11. 1
12. 10000
13. numeral
14. number name
15. 1000
16. 7389
17. 500
18. 0
19. 7
20. 1999
21. successor
22. 1
23. predecessor
24. 1
25. 4000
In simple words: This section reviews basic number properties, place values, successors (next numbers), and predecessors (before numbers).

Exam Tip: Remember that "successor" means adding 1, and "predecessor" means subtracting 1 from the number.

Page 2

Question II. Write the number name
1. 9567
2. 3078
3. 7300
4. 6999
5. 7931
Answer:
1. Nine thousand five hundred sixty-seven
2. Three thousand seventy-eight
3. Seven thousand three hundred
4. Six thousand nine hundred ninety-nine
5. Seven thousand nine hundred thirty-one
In simple words: We write these numbers using words just like we say them out loud.

Exam Tip: Always pay attention to the place of each digit when writing the words, starting from thousands, then hundreds, tens, and ones.

Question III. Write the consecutive numerals
1. 5098, _________, _________, _________, ________, ________.
2. 9900, _________, _________, _________, _________, _________.
3. 7162, _________, _________, _________, _________, _________.
4. 7999, _________, _________, _________, _________, _________.
5. 4079, _________, _________, _________, _________, _________.
6. 5899, _________, _________, _________, _________, _________.
Answer:
1. 5098, 5099, 5100, 5101, 5102, 5103
2. 9900, 9901, 9902, 9903, 9904, 9905
3. 7162, 7163, 7164, 7165, 7166, 7167
4. 7999, 8000, 8001, 8002, 8003, 8004
5. 4079, 4080, 4081, 4082, 4083, 4084
6. 5899, 5900, 5901, 5902, 5903, 5904
In simple words: Consecutive numbers are numbers that follow each other in order without any gaps, by counting forward by 1.

Exam Tip: Be careful when crossing over to a new hundred or thousand, like from 7999 to 8000.

Question IV. Write the consecutive numerals backwards
1. 6892, _________, _________, _________, _________, _________.
2. 7520, _________, _________, _________, _________, _________.
3. 6700, _________, _________, _________, _________, _________.
4. 9670, _________, _________, _________, _________, _________.
5. 8000, _________, _________, _________, _________, _________.
6. 5100, _________, _________, _________, _________, _________.
Answer:
1. 6892, 6891, 6890, 6889, 6888, 6887
2. 7520, 7519, 7518, 7517, 7516, 7515
3. 6700, 6699, 6698, 6697, 6696, 6695
4. 9670, 9669, 9668, 9667, 9666, 9665
5. 8000, 7999, 7998, 7997, 7996, 7995
6. 5100, 5099, 5098, 5097, 5096, 5095
In simple words: This means counting backwards by taking away 1 each time.

Exam Tip: Double check your subtraction when counting backwards, especially when crossing into a lower hundred, such as 6700 to 6699.

Page 3

Question V. Write the numerals
1. Six thousand seven hundred ninety five
2. Eight thousand five
3. Four thousand five
4. Three thousand four hundred sixty eight
5. Two thousand two hundred
6. Seven thousand sixty five
Answer:
1. 6795
2. 8005
3. 4005
4. 3468
5. 2200
6. 7065
In simple words: We write the words as numbers using digits in their correct place value.

Exam Tip: Put a zero as a placeholder when a certain place value (like hundreds or tens) is not mentioned in the words.

Question VI. Write the successor and predecessor of the following
Answer:

In simple words: Successor means the number that comes right after (+1), and predecessor means the number that comes right before (-1).

Exam Tip: Always double check calculations around numbers ending in 9 or 0, like 3999 or 3000.

Page 4

Question VII. Write the next five numbers according to the pattern given
1. 4017, 4027, 4037 ___________________________________________________
2. 1121, 2121, 3121 ___________________________________________________
3. 2305, 2310, 2315 __________________________________________________
4. 6045, 6050, 6055 _________________________________________________
5. 5125, 5225, 5325 _________________________________________________
6. 4022, 4024, 4026 _________________________________________________
Answer:
1. 4047, 4057, 4067, 4077, 4087
2. 4121, 5121, 6121, 7121, 8121
3. 2320, 2325, 2330, 2335, 2340
4. 6060, 6065, 6070, 6075, 6080
5. 5425, 5525, 5625, 5725, 5825
6. 4028, 4030, 4032, 4034, 4036
In simple words: Look closely at how the numbers are changing to find the pattern, and then keep counting the same way.

Exam Tip: Identify which place value is changing (tens, hundreds, thousands, or ones) to find the skip counting rule easily.

Question VIII. Write the place value and face value of the underlined digits
1. 3985
2. 6128
3. 7129
4. 5046
5. 9625
6. 1128
7. 6075
8. 4210
Answer:

In simple words: Face value is just the digit itself, while place value is how much the digit is worth because of where it sits in the number (ones, tens, hundreds, or thousands).

Exam Tip: The place value of 0 is always 0, no matter where it is placed in a number.

Page 5

Question IX. Fill in the blanks :
5185 = _____ thousands _____ hundreds _____ tens ______ ones
3029 = _____ thousands _____ hundreds _____ tens ______ ones
9999 = _____ thousands _____ hundreds _____ tens ______ ones
7650 = _____ thousands _____ hundreds _____ tens ______ ones
Answer:
5185 = 5 thousands 1 hundreds 8 tens 5 ones
3029 = 3 thousands 0 hundreds 2 tens 9 ones
9999 = 9 thousands 9 hundreds 9 tens 9 ones
7650 = 7 thousands 6 hundreds 5 tens 0 ones
In simple words: We break each number down to show how many thousands, hundreds, tens, and ones are in it.

Exam Tip: Write down each digit from left to right as you fill in the blanks from thousands to ones.

Question X. Write the expanded form
5629
7120
5008
6125
3467
4813
6859
5010
Answer:
5629 = 5000 + 600 + 20 + 9
7120 = 7000 + 100 + 20 + 0 (or 7000 + 100 + 20)
5008 = 5000 + 0 + 0 + 8 (or 5000 + 8)
6125 = 6000 + 100 + 20 + 5
3467 = 3000 + 400 + 60 + 7
4813 = 4000 + 800 + 10 + 3
6859 = 6000 + 800 + 50 + 9
5010 = 5000 + 0 + 10 + 0 (or 5000 + 10)
In simple words: Expanded form means writing out the value of each digit added together.

Exam Tip: You can either write 0 for empty place values (like 5000 + 0 + 10 + 0) or simply skip them (5000 + 10) - both are correct.

Page 6

Question XI. Write in the Short form
1. 8 thousands + 5 hundreds + 6 tens + 5 ones =
2. 9 thousands + 0 hundreds + 4 tens + 3 ones =
3. 5 thousands + 7 hundreds + 0 tens + 4 ones =
Answer:
1. 8565
2. 9043
3. 5704
In simple words: This is joining the place values back together to make a regular number.

Exam Tip: Be sure to write '0' in the correct position if any place value (like hundreds or tens) is zero.

Question XII. Show on abacus
1) 3015
2) 5423
3) 2006
4) 1824
Answer:
1) 3015:
2) 5423:
3) 2006:
4) 1824:
In simple words: The abacus is a tool with spikes. We place beads on the spikes to show the count of thousands, hundreds, tens, and ones.

Exam Tip: Keep a spike completely empty when the digit for that place value is 0 (like H in 3015).

Question XIII. Fill in the blanks using < or >
1. 1359 [ ] 650
2. 2643 [ ] 5818
3. 4006 [ ] 6009
4. 3148 [ ] 3146
5. 7326 [ ] 7456
6. 8436 [ ] 8435
Answer:
1. 1359 > 650
2. 2643 < 5818
3. 4006 < 6009
4. 3148 > 3146
5. 7326 < 7456
6. 8436 > 8435
In simple words: The sign ">" points to the smaller number and opens wide towards the bigger number.

Exam Tip: First compare the thousands digit. If they are equal, compare the hundreds, then tens, and then ones.

Question XIV. Encircle the largest number
1. 8767, 7676, 6767, 8787, 7867
2. 4008, 4800, 4080, 4088, 4808
3. 1357, 1753, 1573, 1735 1537
Answer:
1. 8787
2. 4808
3. 1753
In simple words: We find the biggest number in each group by looking at their place values.

Exam Tip: When the thousands digit is the same, compare the hundreds digit to find which number is larger.

Page 7

Question XV. Encircle the smallest number
1. 7502, 7052, 7250, 7520, 7025
2. 8731, 3645, 4832, 3265, 1985
3. 3001, 3100, 3101, 3111, 3003
Answer:
1. 7025
2. 1985
3. 3001
In simple words: We find the tiniest number in each line by comparing the digits from left to right.

Exam Tip: Be extra careful with numbers that have zeroes in different places, like 7052 and 7025.

Question XVI. Arrange in ascending order
1. 1952, 1529, 1925, 1592
2. 6803, 6308, 6830, 6008
3. 4125, 4521, 4152, 4512
4. 7309, 7903, 7930, 9730
5. 5015, 5510, 5550, 5115
Answer:
1. 1529, 1592, 1925, 1952
2. 6008, 6308, 6803, 6830
3. 4125, 4152, 4512, 4521
4. 7309, 7903, 7930, 9730
5. 5015, 5115, 5510, 5550
In simple words: Ascending order means arranging numbers starting from the smallest and going up to the largest.

Exam Tip: Find the smallest number first, write it down, and then find the next smallest from the remaining numbers.

Question XVI. Arrange in descending order
1. 2861, 2802, 2820, 2028
2. 8092, 9082, 9092, 8082
3. 9887, 7789, 7897, 9888
4. 6125, 6521, 6152, 6512
Answer:
1. 2861, 2820, 2802, 2028
2. 9092, 9082, 8092, 8082
3. 9888, 9887, 7897, 7789
4. 6521, 6512, 6152, 6125
In simple words: Descending order means arranging numbers starting from the largest and going down to the smallest.

Exam Tip: Think of descending as going down a staircase - starting from the top (biggest number) to the bottom (smallest number).

Question XVII. Write the greatest and smallest 4 digit number by using the given digits.
1. 7, 1, 6, 5
2. 5, 3, 0, 9
3. 6, 0, 1, 5
4. 9, 3, 8, 4
5. 5, 6, 0, 7
6. 4, 5, 7, 3
7. 6, 8, 0, 4
Answer:

In simple words: To make the greatest number, put digits in order from biggest to smallest. To make the smallest number, put them from smallest to biggest (but never start with 0!).

Exam Tip: A multi-digit number cannot begin with 0. If 0 is one of the digits, place it in the second position (hundreds place) to form the smallest 4-digit number.

Page 8

LN. 3 : ADDITION AND SUBTRACTION

Question I. Fill in the blanks :
1. The numbers which are added are called _______________.
2. The answer of addition is called ______________.
3. Zero added to any number is equal to the ______________.
4. The answer of subtraction is called ______________.
5. Any number - Zero = ______________.
6. Any number - The same number = ______________.
7. 3165 + 0 = ______________.
8. 968 - 0 = ______________.
9. 5818 - 5818 = ______________.
10. 30 + 60 = 60 + ______________.
11. 45 + ( 80 + 90) = 90 + 80 + ______________.
12. 20 + 40 = 60. The addends are ____________ and ____________.
13. 75 + 25 = 100. The sum is ______________.
14. 65 - 25 = 40. Here the difference is ______________.
Answer:
1. addends
2. sum
3. the number itself
4. difference
5. the number itself
6. 0
7. 3165
8. 968
9. 0
10. 30
11. 45
12. 20 and 40
13. 100
14. 40
In simple words: This section teaches basic rules of adding and subtracting numbers, including adding/subtracting zero.

Exam Tip: Remember that the order of numbers does not change the sum of addition (commutative property), as in 30 + 60 = 60 + 30.

Question II. Add the following
Answer:

In simple words: Addition means putting numbers together. We always start adding from the ones place on the right, then move to tens, hundreds, and thousands.

Exam Tip: Remember to carry over to the next place value on the left whenever the sum of a column is 10 or more.

Page 9

Question III. Subtract the following
Answer:

In simple words: Subtraction means taking a smaller number away from a larger number. Always subtract starting from the ones place, and borrow from the left column if the top digit is smaller than the bottom digit.

Exam Tip: Always double check your borrowing steps, making sure to decrease the number you borrowed from by exactly 1.

Question IV. Do the following
1. In a school there are 5390 boys and 3175 girls. How many students are there in all ?
2. In a garden there are 4120 red rose saplings and 2342 white rose saplings. How many saplings are there in all ?
3. In a school library there 2125 English books, 3280 Science books and 1230 Hindi. How many books are there in all.
4. The population of a village is 5390. Out of them 3125 are males. Find the population of females.
5. In three different sectors of a city the number of people living are 3180, 2496 and 3112 respectively. What is the total number of people living in these sector ?
6. Find the difference between the greatest 4 digit number and the least 4 digit number.
7. In a school there are 5985 students. On a rainy day 1009 students were absent. How many were present on that day ?
8. The sum of two numbers is 7854. If one of the numbers is 2435, find the other.
Answer:
1. Total number of boys = 5390
Total number of girls = 3175
Total number of students = 5390 + 3175 = 8565 students

2. Number of red rose saplings = 4120
Number of white rose saplings = 2342
Total rose saplings = 4120 + 2342 = 6462 rose saplings

3. Number of English books = 2125
Number of Science books = 3280
Number of Hindi books = 1230
Total books in library = 2125 + 3280 + 1230 = 6635 books

4. Total population of the village = 5390
Number of males = 3125
Number of females = 5390 - 3125 = 2265 females

5. Number of people in first sector = 3180
Number of people in second sector = 2496
Number of people in third sector = 3112
Total number of people = 3180 + 2496 + 3112 = 8788 people

6. Greatest 4-digit number = 9999
Least 4-digit number = 1000
Difference = 9999 - 1000 = 8999

7. Total students in school = 5985
Number of absent students = 1009
Number of present students = 5985 - 1009 = 4976 students

8. Sum of the two numbers = 7854
One of the numbers = 2435
The other number = 7854 - 2435 = 5419
In simple words: This section has story problems where we use addition or subtraction to solve real-life questions about schools, populations, gardens, and numbers.

Exam Tip: Look for keywords like "in all", "total", or "altogether" to know you need to add, and keywords like "difference", "absent", or "how many are left" to subtract.

Page 10

GEOMETRY

Question I. Fill in the blanks
1. _______________ shows position.
2. A point is represented by a _______________.
3. _______________ is the shortest distance between two points.
4. A line segment has _______________ end points.
5. A _______________ has a definite length.
6. A line segment extended endlessly in one direction is called a _______________.
7. A ray has _______________ end points.
8. A line has _______________ end points.
9. A line segment extended endlessly in both directions is called a _____________.
10. A triangle is bounded by _______________ line segments.
11. A triangle has _______________ sides and _______________ vertices.
12. A square has _______________ sides and _______________ vertices.
13. All sides of a square are _______________.
14. A rectangle has _______________ sides and _______________ vertices.
15. The _______________ sides of a rectangle are equal.
16. A circle has _______________ sides.
17. A cube has ________ faces, __________ vertices and _________ edges.
18. A sugar cube has _______________ faces.
19. A cuboid has ________faces, _______ vertices and _________edges.
20. A cone has ________edges ________vertex and __________faces.
21. A cylinder has __________faces and _______________ edges.
22. A sphere has ------------- face and ____________vertex.
23. All faces of a cube are _____________.
24. Pepse can has _____________shape.
Answer:
1. A point
2. dot
3. A line segment
4. two
5. line segment
6. ray
7. one
8. no
9. line
10. three
11. three, three
12. four, four
13. equal (or of same length)
14. four, four
15. opposite
16. zero (or no)
17. 6, 8, 12
18. 6
19. 6, 8, 12
20. 1, 1, 2
21. 3, 2
22. 1, 0
23. square (or equal)
24. cylindrical
In simple words: This geometry section defines basic shapes (like squares, circles, triangles) and 3D solids (like cubes, cones, cylinders) and how we describe them.

Exam Tip: Remember that a line can go on forever in both directions and has no end points, while a line segment has a fixed length and two endpoints.

Page 11

Question II. Draw the following line segments
1. A line Segment AB = 8 cm
2. A line Segment PQ = 7 cm
3. A line Segment LM = 9 cm
4. Draw a line segment XY = 6 cm
Answer:
1. AB = 8 cm:
2. PQ = 7 cm:
3. LM = 9 cm:
4. XY = 6 cm:
In simple words: Draw a straight line with a ruler from 0 to the given centimeter length, mark the two ends as dots, and label them with capital letters.

Exam Tip: When using a ruler to draw line segments, always start your line exactly at the "0" mark of the ruler, not at the physical edge of the ruler.

Question III. Answer the following :
1) Write 3 properties of a triangle
2) Write 3 properties of a square
3) Write 3 properties of a rectangle
4) Write 2 properties of a circle
Answer:
1) Properties of a triangle:
- It has three sides.
- It has three vertices (corners).
- The sum of its three interior angles is always 180 degrees.

2) Properties of a square:
- It has four equal sides.
- It has four vertices.
- All its four angles are right angles (90 degrees).

3) Properties of a rectangle:
- It has four sides and four vertices.
- Its opposite sides are equal in length.
- All its four angles are right angles (90 degrees).

4) Properties of a circle:
- It has no straight sides or vertices (it is a completely curved closed figure).
- The distance from the center to any point on its boundary is always equal.
In simple words: This section lists the standard geometric facts that define simple 2D shapes like triangles, squares, rectangles, and circles.

Exam Tip: Notice how a square is a special type of rectangle where all four sides are of equal length.