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 and carry over 1
Step 4. Add the hundreds: 5 + 6 = 11, plus the carry over 1 = 12, write 2 and carry over 1
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 and carry over 2
Step 4. Add the hundreds: 8 + 6 + 5 = 19, plus the carry over 2 = 21, write 1 and carry over 2
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.
$\mathrm{}$
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 ninetyeight).
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 eightyfive).
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 thirtyfour).
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
= 11187.
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 ninetyseven).
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.
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1. What are some strategies for teaching addition and subtraction to fourthgrade students? 
2. How can I help my child improve their addition and subtraction skills at home? 
3. What are some common mistakes students make when performing addition and subtraction operations? 
4. How can I make addition and subtraction more enjoyable for my fourthgrade students? 
5. Are there any online resources or educational apps that can help with teaching addition and subtraction? 

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