Math worksheet for practicing addition and subtraction of 100 from various numbers.

Let's solve the problem step by step.

Task:

For each number in the "Number" column, calculate:
- 100 more (add 100)
- 100 less (subtract 100)

We'll go through each number one by one.

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Step-by-step Solutions:

1. 220
- 100 more: $ 220 + 100 = 320 $
- 100 less: $ 220 - 100 = 120 $

2. 720
- 100 more: $ 720 + 100 = 820 $
- 100 less: $ 720 - 100 = 620 $

3. 100
- 100 more: $ 100 + 100 = 200 $
- 100 less: $ 100 - 100 = 0 $

4. 650
- 100 more: $ 650 + 100 = 750 $
- 100 less: $ 650 - 100 = 550 $

5. 483
- 100 more: $ 483 + 100 = 583 $
- 100 less: $ 483 - 100 = 383 $

6. 555
- 100 more: $ 555 + 100 = 655 $
- 100 less: $ 555 - 100 = 455 $

7. 384
- 100 more: $ 384 + 100 = 484 $
- 100 less: $ 384 - 100 = 284 $

8. 987
- 100 more: $ 987 + 100 = 1087 $
- 100 less: $ 987 - 100 = 887 $

9. 897
- 100 more: $ 897 + 100 = 997 $
- 100 less: $ 897 - 100 = 797 $

10. 356
- 100 more: $ 356 + 100 = 456 $
- 100 less: $ 356 - 100 = 256 $

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✔ Final Answer Table:

| Number | 100 more | 100 less |
|--------|----------|----------|
| 1. 220 | 320 | 120 |
| 2. 720 | 820 | 620 |
| 3. 100 | 200 | 0 |
| 4. 650 | 750 | 550 |
| 5. 483 | 583 | 383 |
| 6. 555 | 655 | 455 |
| 7. 384 | 484 | 284 |
| 8. 987 | 1087 | 887 |
| 9. 897 | 997 | 797 |
| 10. 356| 456 | 256 |

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🔍 Explanation:

This exercise helps understand place value, especially how adding or subtracting 100 affects the hundreds place of a number. For example:
- Adding 100 increases the hundreds digit by 1.
- Subtracting 100 decreases the hundreds digit by 1.
- If the number is below 100 (like 100), subtracting 100 gives 0.
- If the number is large (like 987), adding 100 can increase it into the thousands (e.g., 1087).

This builds number sense and mental math skills.

Let me know if you'd like this as a printable worksheet!