Class 4 Maths Practice Question Answers - Addition and Subtraction

Question 1: Add 4532 and 2687.

Solution: 

Step 1. Arrange the numbers in columns:

Step 2. Add the ones: 2 + 7 = 9
Step 3. Add the tens: 3 + 8 = 11, write 1 in tens place and carry over 1 to the hundreds place. 
Step 4. Add the hundreds: 5 + 6 = 11, plus the carry over 1 = 12, write 2 in hundreds place and carry over 1 to the thousands place.
Step 5. Add the thousands: 4 + 2 = 6, plus the carry over 1 = 7

Answer: 7219

Question 2: Add 7895, 5675, and 2589.

Solution: Step 1. Arrange the numbers in columns:

Step 2. Add the ones: 5 + 5 + 9 = 19, write 9 and carry over 1
Step 3. Add the tens: 9 + 7 + 8 = 24, plus the carry over 1 = 25, write 5 in tens place and carry over 2 to the hundred place. 
Step 4. Add the hundreds: 8 + 6 + 5 = 19, plus the carry over 2 = 21, write 1 in hundreds place and carry over 2 to the thousands place.
Step 5. Add the thousands: 7 + 5 + 2 = 14, plus the carry over 2 = 16

Answer: 16159

Question 3: A farmer had 43,562 apples. He sold 25,789 apples. How many apples does he have left?

Solution: To find out how many apples the farmer has left, we need to subtract the number of apples sold from the total number of apples.

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So, the farmer has 17,773 apples left.

Question 4: Add 7,521; 1 ,025 and 1 ,352.

Solution :
Step 1. Arrange the numbers in columns.

Step 2. Adding ones, we have

Step 3. Adding tens, we have

Step 4. Adding hundreds, we have

Step 5. Adding thousands, we have

Hence, 7,521 + 1,025 + 1,352 = 9,898
(Nine thousand, eight hundred ninety-eight).

Question 5: Add 2,908, 6,123 and 254

Solution :
Step 1.

Step 2.

Step 3.

Step 4.

Step 5.

Hence,
2,908 + 6,123 + 254 = 9,285 

(Nine thousand, two hundred eighty-five).

Question 6: Which number is 528 more than 7,874?

Solution :

The required number = 7,874 + 528 = 8,402. Hence, the required number is 8,402.

Question 7: Simplify : 7,530 + 1, 817 - 5,173

Solution :

Hence, 7,530 + 1,817- 5,173 = 4,174.

Question 8: 3,856 - 2,385 + 6,389 - 987

Solution :

Hence, 3,856 - 2,385 + 6,389 - 987 = 6,873

Question 9: Subtract 5,013 from 8,347.

Solution :
Step 1. Arrange the numbers in columns.

Step 2. Subtracting ones, we have

Step 3. Subtracting tens, we have

Step 4. Subtracting hundreds, we have

Step 5. Subtracting thousands, we have

Hence, 8,347 - 5,013 = 3,334
(Three thousand, three hundred thirty-four).

Question 10: A factory produced 3,263 mercury lamps in 2012. In 2013, it produced 4,450 mercury lamps. By how much did the factory's production increase?

Solution :

Production in 2013 = 4,450
Production in 2012 = 3,263
Increase in production = 4,450 - 3,263
= 1,187.
Hence, the production increased by 1,187.

Question 11: Subtract 2,856 from 8, 153.

Solution :
Step 1. Arrange the numbers in columns.

Step 2. Subtract the ones. Here 3 < 6, so regroup 5 tens 3 ones as 4 tens and 13 ones.

Step 3. Subtract the tens. Here, 4 < 5, so, regroup 1 hundred 4 tens as 0 hundreds and 14 tens.

Step 4. Subtract the hundreds. Here, 0 < 8. so regroup 8 thousands 0 hundreds as 7 thousand and 10  hundreds.

Step 5. Subtract the thousands.

Hence, 8,153 - 2,856 = 5,297
(Five thousand, two hundred ninety-seven).

Question 12: What must be added to 4,213 to get 7,631?

Solution :

The sum of two numbers = 7,631.
One number= 4,213
The other number= 7,631 - 4,213
= 3,418
Hence, the required number = 3,418.

Question 13: Subtract: 9,000 - 6.124.

Solution:
Step 1. Arrange the numbers in columns.

Step 2. Regroup 9 thousands.
9 thousands = 8 thousands + 10 hundreds
10 hundreds = 9 hundreds + 10 tens
10 tens = 9 tens + 10 ones

Step 3. Subtract the ones.

Step 4. Subtract the tens.

Step 5. Subtract the hundreds.

Step 6. Subtract the thousands.

Hence, 9,000 - 6,124 = 2,876.