CBSE Class 3 Mathematics Addition And Subtraction Worksheet

Lesson 3 - Addition and Subtraction

I. Fill in the blanks:

Question 1. The answer of addition is called ______.
Answer: sum
In simple words: When we add two or more numbers, the final answer we get is called the sum.

Exam Tip: Remember that "sum" is the special mathematical name for the answer of an addition problem.

Question 2. The numbers which are added are called ______.
Answer: addends
In simple words: The numbers that we put together in addition are called addends.

Exam Tip: In 5 + 3 = 8, the numbers 5 and 3 are the addends.

Question 3. The answer of subtraction is called _____.
Answer: difference
In simple words: The answer we get when we subtract one number from another is called the difference.

Exam Tip: "Difference" is the key word to look for when you need to subtract numbers.

Question 4. Zero added to any number is equal to the ______.
Answer: number itself
In simple words: If you add zero to a number, the number does not change at all.

Exam Tip: This is the identity property of addition, where any number plus zero is always that same number.

Question 5. Any number - The same number = ______.
Answer: 0
In simple words: When you subtract a number from itself, you are left with zero.

Exam Tip: Whenever you subtract identical numbers, such as 9 - 9, the result is always 0.

Question 6. 3160+0 = ______.
Answer: 3160
In simple words: Adding zero to 3160 does not change its value, so it stays 3160.

Exam Tip: Adding zero to a large number is a common trick question; the number remains unchanged.

Question 7. Any number - zero = _______.
Answer: the number itself
In simple words: If you take away zero from any number, you are left with the exact same number.

Exam Tip: Subtracting zero from a number does not reduce its value at all.

Question 8. 565-0 = ______.
Answer: 565
In simple words: Taking away zero from 565 leaves the number exactly as it was.

Exam Tip: Use this subtraction property of zero to quickly solve such fill-in-the-blanks.

Question 9. 6025 - 6025 = ______.
Answer: 0
In simple words: Subtracting 6025 from 6025 leaves us with zero.

Exam Tip: When the number you are subtracting is equal to the starting number, the answer is always zero.

Question 10. 80+100 = 100+ _____.
Answer: 80
In simple words: Changing the order of the numbers in addition does not change the answer.

Exam Tip: This is the commutative property of addition. You do not need to calculate; just swap the order of the numbers.

Question 11. 30+20 = 50, the addends are ____ and ____.
Answer: 30, 20
In simple words: In this problem, 30 and 20 are the two numbers we add together.

Exam Tip: The numbers that you combine to make a total are called the addends.

Question 12. 35+ (15+80) = 80+15+_____.
Answer: 35
In simple words: Even when we group or order numbers differently, the same numbers must be present on both sides.

Exam Tip: Identify which number is missing on the right side by looking at the numbers on the left side of the equals sign.

Question 13. 70+30 = 100. The sum is ______.
Answer: 100
In simple words: The final answer we get after adding 70 and 30 is 100.

Exam Tip: Sum refers to the total or final answer of an addition operation.

Question 14. 55-35 = 20. Here the difference is _____.
Answer: 20
In simple words: When we subtract 35 from 55, the final result we get is 20.

Exam Tip: The result of a subtraction problem is always called the difference.

II. Add:

Question 1. 3175 + 2839
Answer:

In simple words: Align the numbers in columns and add the digits from right to left. Carry over numbers when they go over 9.

Exam Tip: Always write carried-over digits on top of the next column so you do not forget to add them.

Question 2. 4863 + 2695
Answer:

In simple words: Add 3 and 5 in the ones column, then 6 and 9 in the tens column, and carry over carefully to the hundreds and thousands.

Exam Tip: Align your place value columns neatly to avoid making calculation errors.

Question 3. 6490 + 1193
Answer:

In simple words: Add the digits column by column, starting from the ones column on the far right.

Exam Tip: Adding 9 and 9 in the tens place gives 18, so write 8 and carry over 1 to the hundreds place.

Question 4. 2999 + 6676
Answer:

In simple words: Group and add the columns one by one, moving to the left each time.

Exam Tip: With many nines, there will be multiple carry-overs. Keep track of each one clearly.

Question 5. 5818 + 2136 + 2004
Answer:

In simple words: Line up all three numbers in columns. Add the ones column first, then the tens, then the hundreds, and finally the thousands.

Exam Tip: When adding three numbers, you can add two of them first, and then add the third number to their sum.

Question 6. 3185 + 4011 + 1263
Answer:

In simple words: Stack the three numbers and add them column by column from right to left.

Exam Tip: Double check your addition in the tens column: 8 + 1 + 6 = 15, so carry over 1 to the hundreds column.

Question 7. 4821 + 2004 + 3695
Answer:

In simple words: Add the columns carefully. Since the total goes over ten thousand, you will have a five-digit answer.

Exam Tip: When the sum in the thousands column goes over 9, write the full remaining number to create a ten-thousands place.

Question 8. 1025 + 4183 + 4321
Answer:

In simple words: Align the digits properly and add them column by column starting from the ones place.

Exam Tip: Be careful to align the digits of each number correctly under the thousands, hundreds, tens, and ones places.

Question 9. 6326 + 5315
Answer:

In simple words: Line up the two numbers and add them. The total will be a five-digit number.

Exam Tip: Write down your carry-overs clearly on top of each place column to make self-checking easy.

III. Subtract:

Question 1. 5402 - 4603
Answer:

In simple words: We cannot subtract 3 from 2, so we borrow from the next column. Repeat this step to find the answer.

Exam Tip: When borrowing across a column with zero, borrow from the next non-zero column to the left first.

Question 2. 3456 - 1892
Answer:

In simple words: Subtract each column from right to left, borrowing from the next column on the left when needed.

Exam Tip: Double check your work by adding the answer to the smaller number. It should equal the larger number.

Question 3. 3645 - 1909
Answer:

In simple words: Borrow 1 ten to turn 5 into 15, then subtract 9. Repeat borrowing for the other columns.

Exam Tip: Cross out the borrowed digits and write their new smaller values on top to avoid simple mistakes.

Question 4. 6757 - 3812
Answer:

In simple words: Align the numbers and subtract carefully, column by column.

Exam Tip: Borrow from the thousands place to turn 7 hundreds into 17 hundreds, then subtract 8.

Question 5. 3052 - 2511
Answer:

In simple words: Stack the numbers in columns and subtract, borrowing when needed.

Exam Tip: Make sure you write down 0 in the thousands place of the answer if it becomes zero after borrowing, or simply leave it blank.

Question 6. 7000 - 5219
Answer:

In simple words: Since we have three zeros, we borrow all the way from the thousands place to do the subtraction.

Exam Tip: When borrowing across multiple zeros, the zeroes in the middle turn into nines, and the last zero becomes ten.

Question 7. 8001 - 6992
Answer:

In simple words: Borrow across the zeros from the thousands place to perform the subtraction.

Exam Tip: Keep your borrowing steps clean and clear on paper so you do not make calculation errors.

Question 8. 8888 - 5992
Answer:

In simple words: Align the numbers in columns and subtract them starting from the ones place.

Exam Tip: Borrow from the thousands place to turn 8 hundreds into 18 hundreds, then subtract 9.

IV. Do the following:

Question 1. In a school library there are 3025 English books, 3275 Science books and 1835 Hindi books. How many books are there in all?
Answer:
Number of English books = 3025
Number of Science books = 3275
Number of Hindi books = 1835
Total number of books = 3025 + 3275 + 1835 = 8135
There are 8135 books in total in the library.
In simple words: Add all the English, Science, and Hindi books together to find the total number of books in the library.

Exam Tip: Always write down your word statements clearly before doing the column addition.

Question 2. In a school there are 5890 boys and 4075 girls. How many students are there in all?
Answer:
Number of boys in the school = 5890
Number of girls in the school = 4075
Total number of students = 5890 + 4075 = 9965
There are 9965 students in total in the school.
In simple words: Add the number of boys and the number of girls to find the total number of students.

Exam Tip: Keywords like "in all" tell you that you need to add the numbers together.

Question 3. 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
There are 6462 saplings in total in the garden.
In simple words: We find the total number of saplings by adding the red and white rose saplings together.

Exam Tip: Make sure you align the digits properly in their place value columns before adding.

Question 4. The sum of two numbers is 7854. If one the numbers is 3435, find the other.
Answer:
Sum of the two numbers = 7854
One of the numbers = 3435
The other number = 7854 - 3435 = 4419
The other number is 4419.
In simple words: Subtract the known number from the total sum to find the other number.

Exam Tip: When the sum of two numbers is given, subtract the known number to find the missing one.

Question 5. The population of a village is 5690. Out of them 4025 are males. Find the population of females.
Answer:
Total population of the village = 5690
Number of males = 4025
Number of females = 5690 - 4025 = 1665
There are 1665 females in the village.
In simple words: Subtract the number of males from the total population to find the number of females.

Exam Tip: Remember to borrow carefully across the columns when doing the subtraction.

Question 6. Find the difference between the greatest 4 digit number and the least 4 digit number.
Answer:
Greatest 4-digit number = 9999
Least (smallest) 4-digit number = 1000
Difference = 9999 - 1000 = 8999
The difference between the two numbers is 8999.
In simple words: Subtract the smallest 4-digit number (1000) from the largest 4-digit number (9999) to get the answer.

Exam Tip: The greatest four-digit number is 9999, and the smallest is 1000. Subtract them to find the difference.

Question 7. In three different sectors of a city the number of people living are 3112, 2496, 3180 respectively. What is the total number of people living in these sectors?
Answer:
People living in Sector 1 = 3112
People living in Sector 2 = 2496
People living in Sector 3 = 3180
Total number of people = 3112 + 2496 + 3180 = 8788
There are 8788 people living in these sectors in total.
In simple words: Add the number of people in all three sectors to find the total population.

Exam Tip: When adding three numbers, write them neatly in columns and add from right to left.

Question 8. In a school there are 5905 students. On a rainy day 1009 students were absent. How many were present on that day?
Answer:
Total number of students = 5905
Number of absent students = 1009
Number of present students = 5905 - 1009 = 4896
There were 4896 students present on that day.
In simple words: Subtract the number of absent students from the total number of students to find how many were present.

Exam Tip: Pay close attention to borrowing when subtracting 9 from 5 in the ones column.