CBSE Class 3 Mathematics Addition and Subtraction Set 02

ADDITION AND SUBTRACTION

I. Fill in the blanks :

Question 1. The numbers which are added are called _______________.
Answer: addends
In simple words: The numbers that we add together are called addends.

Exam Tip: Remember that addends are the parts that make up the total sum.

Question 2. The answer of addition is called ______________.
Answer: sum
In simple words: The total result obtained after adding numbers is called the sum.

Exam Tip: Sum refers strictly to the result of an addition operation.

Question 3. Zero added to any number is equal to the ______________.
Answer: number itself
In simple words: Adding zero to any number does not change its value.

Exam Tip: This is known as the additive identity property of zero.

Question 4. The answer of subtraction is called ______________.
Answer: difference
In simple words: The result you get when you subtract one number from another is the difference.

Exam Tip: Difference is the standard mathematical term for a subtraction result.

Question 5. Any number - Zero = ______________.
Answer: the number itself
In simple words: Subtracting zero from any number leaves the number unchanged.

Exam Tip: Any number minus 0 always equals the starting number.

Question 6. Any number - The same number = ______________.
Answer: 0
In simple words: Taking a number away from itself leaves nothing, which is zero.

Question 7. 3165 + 0 = ______________.
Answer: 3165
In simple words: Adding zero leaves 3165 exactly as it is.

Exam Tip: Apply the additive identity property directly.

Question 8. 968 - 0 = ______________.
Answer: 968
In simple words: Subtracting zero leaves 968 unchanged.

Exam Tip: Any number minus zero remains the same.

Question 9. 5818 - 5818 = ______________.
Answer: 0
In simple words: Subtracting a number from itself results in zero.

Exam Tip: Equal numbers subtracted yield 0.

Question 10. 30 + 60 = 60 + ______________.
Answer: 30
In simple words: Changing the order of numbers in addition does not change the answer.

Exam Tip: This illustrates the commutative property of addition.

Question 11. 45 + ( 80 + 90) = 90 + 80 + ______________.
Answer: 45
In simple words: Both sides must contain the exact same numbers regardless of grouping or order.

Exam Tip: Check that all numbers (45, 80, 90) appear on both sides of the equation.

Question 12. 20 + 40 = 60. The addends are ____________ and ____________.
Answer: 20, 40
In simple words: The numbers being added together are 20 and 40.

Exam Tip: Identify the numbers on the left side of the plus sign.

Question 13. 75 + 25 = 100. The sum is ______________.
Answer: 100
In simple words: The result of adding 75 and 25 is 100.

Exam Tip: The sum is always the final answer of addition.

Question 14. 65 - 25 = 40. Here the difference is ______________.
Answer: 40
In simple words: The result of subtraction is 40.

Exam Tip: The difference is the answer in a subtraction problem.

Add:

Question 1. 3175 + 4863
Answer:
\(3175 + 4863 = 8038\)
In simple words: Add column by column from right to left, carrying over when necessary.

Exam Tip: Always align numbers by their place values (ones, tens, hundreds, thousands).

Question 2. 5818 + 2795
Answer:
\(5818 + 2795 = 8613\)
In simple words: Combine the numbers by adding each place value column.

Exam Tip: Double-check your carry-overs in the tens and hundreds columns.

Question 3. 6490 + 2839
Answer:
\(6490 + 2839 = 9329\)
In simple words: Add the digits column by column starting from the ones place.

Question 4. 3185 + 2136 + 1123
Answer:
\(3185 + 2136 + 1123 = 6444\)
In simple words: Add all three numbers together column by column.

Exam Tip: Line up all numbers carefully before adding three or more numbers.

Question 5. 4011 + 3125 + 1263
Answer:
\(4011 + 3125 + 1263 = 8399\)
In simple words: Sum the digits of each column from right to left.

Exam Tip: Ensure proper vertical alignment of digits.

Question 6. 3821 + 2004 + 3695
Answer:
\(3821 + 2004 + 3695 = 9520\)
In simple words: Add the three numbers step by step or in a single vertical column.

Exam Tip: Check addition in the tens column where carries occur.

Question 7. 3999 + 5676
Answer:
\(3999 + 5676 = 9675\)
In simple words: Add the two numbers column by column with carrying.

Exam Tip: Watch out for multiple carries across adjacent columns.

Question 8. 5315 + 6326
Answer:
\(5315 + 6326 = 11641\)
In simple words: Add the digits to get a five-digit sum.

Exam Tip: Ensure the thousands and ten-thousands columns are correctly positioned.

Question 9. 3123 + 1234 + 4321
Answer:
\(3123 + 1234 + 4321 = 8678\)
In simple words: Add the three numbers together vertically.

Exam Tip: Keep your columns straight to prevent addition errors.

Subtract

Question 1. 3912 - 2511
Answer:
\(3912 - 2511 = 1401\)
In simple words: Subtract each digit in the bottom number from the top number column by column.

Exam Tip: Start subtracting from the ones place and move left.

Question 2. 6858 - 3052
Answer:
\(6858 - 3052 = 3806\)
In simple words: Perform subtraction column by column from right to left.

Exam Tip: Verify each column subtraction carefully.

Question 3. 7319 - 5219
Answer:
\(7319 - 5219 = 2100\)
In simple words: Subtract the bottom number from the top number.

Exam Tip: Notice that the ones and tens digits cancel out completely.

Question 4. 5402 - 3148
Answer:
\(5402 - 3148 = 2254\)
In simple words: Borrow from neighboring columns when the top digit is smaller than the bottom digit.

Exam Tip: Pay special attention to borrowing across zeros.

Question 5. 3645 - 1892
Answer:
\(3645 - 1892 = 1753\)
In simple words: Subtract column by column using borrowing where necessary.

Exam Tip: Double check your borrowing steps in the hundreds and tens columns.

Question 6. 3456 - 1909
Answer:
\(3456 - 1909 = 1547\)
In simple words: Subtract the subtrahend from the minuend with appropriate borrowing.

Exam Tip: Borrow correctly when the top digit is smaller than the bottom digit.

Question 7. 7314 - 2451
Answer:
\(7314 - 2451 = 4863\)
In simple words: Perform column subtraction from right to left with borrowing.

Exam Tip: Take your time with the borrowing steps in the hundreds and thousands columns.

Question 8. 9301 - 4603
Answer:
\(9301 - 4603 = 4698\)
In simple words: Subtract using borrowing across zero columns.

Exam Tip: Be careful when borrowing from a zero.

Question 9. 6285 - 3179
Answer:
\(6285 - 3179 = 3106\)
In simple words: Subtract the bottom number from the top number column by column.

Question 1. In a school there are 5390 boys and 3175 girls. How many students are there in all ?
Answer:
Number of boys = 5390
Number of girls = 3175
Total number of students = \(5390 + 3175 = 8565\)
Total students in the school = 8565
In simple words: Add the number of boys and girls together to find the total number of students.

Exam Tip: Key phrase "in all" indicates that addition should be used.

Question 2. In a garden there are 4120 red rose saplings and 2342 white rose saplings. How many saplings are there in all ?
Answer:
Number of red rose saplings = 4120
Number of white rose saplings = 2342
Total number of saplings = \(4120 + 2342 = 6462\)
Total saplings in the garden = 6462
In simple words: Combine the red and white rose saplings by adding them together.

Exam Tip: Look for words like "in all" to determine the correct arithmetic operation.

Question 3. In a school library there 2125 English books, 3280 Science books and 1230 Hindi. How many books are there in all.
Answer:
Number of English books = 2125
Number of Science books = 3280
Number of Hindi books = 1230
Total number of books = \(2125 + 3280 + 1230 = 6635\)
Total books in the library = 6635
In simple words: Add all three types of books together to find the total sum.

Exam Tip: When combining three or more quantities, set them up in a clear vertical addition column.

Question 4. The population of a village is 5390. Out of them 3125 are males. Find the population of females.
Answer:
Total population of the village = 5390
Number of males = 3125
Population of females = \(5390 - 3125 = 2265\)
Total female population = 2265
In simple words: Subtract the male population from the total village population to find the female population.

Exam Tip: Finding a part when the total and the other part are given requires subtraction.

Question 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 ?
Answer:
People living in sector 1 = 3180
People living in sector 2 = 2496
People living in sector 3 = 3112
Total number of people = \(3180 + 2496 + 3112 = 8788\)
Total population in the three sectors = 8788
In simple words: Add the populations of all three sectors to get the total number of people.

Exam Tip: The word "total" indicates that you need to add the given numbers.

Question 6. Find the difference between the greatest 4 digit number and the least 4 digit number
Answer:
Greatest 4-digit number = 9999
Least 4-digit number = 1000
Difference = \(9999 - 1000 = 8999\)
Required difference = 8999
In simple words: Subtract the smallest 4-digit number from the largest 4-digit number.

Exam Tip: Remember that the greatest 4-digit number is 9999 and the least 4-digit number is 1000.