Practice sheet for basic arithmetic operations including addition, subtraction, multiplication, and division.

Let’s solve each problem one by one, carefully checking our work.

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Addition Problems:

1. 363 + 125
3 + 5 = 8 (ones)
6 + 2 = 8 (tens)
3 + 1 = 4 (hundreds)
→ 488

2. 273 + 351
3 + 1 = 4 (ones)
7 + 5 = 12 → write 2, carry 1 (tens)
2 + 3 + 1 (carry) = 6 (hundreds)
→ 624

3. 958 + 345
8 + 5 = 13 → write 3, carry 1 (ones)
5 + 4 + 1 = 10 → write 0, carry 1 (tens)
9 + 3 + 1 = 13 → write 13 (hundreds and thousands)
→ 1303

4. 428 + 239
8 + 9 = 17 → write 7, carry 1 (ones)
2 + 3 + 1 = 6 (tens)
4 + 2 = 6 (hundreds)
→ 667

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Subtraction Problems:

5. 562 - 280
2 - 0 = 2 (ones)
6 - 8 → can’t do, borrow from 5 → 16 - 8 = 8 (tens), now hundreds is 4
4 - 2 = 2 (hundreds)
→ 282

6. 623 - 245
3 - 5 → borrow → 13 - 5 = 8 (ones), tens become 1
1 - 4 → borrow → 11 - 4 = 7 (tens), hundreds become 5
5 - 2 = 3 (hundreds)
→ 378

7. 125 - 109
5 - 9 → borrow → 15 - 9 = 6 (ones), tens become 1
1 - 0 = 1 (tens)
1 - 1 = 0 (hundreds) → don’t write leading zero
→ 16

8. 625 - 538
5 - 8 → borrow → 15 - 8 = 7 (ones), tens become 1
1 - 3 → borrow → 11 - 3 = 8 (tens), hundreds become 5
5 - 5 = 0 (hundreds) → don’t write leading zero
→ 87

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Multiplication Problems:

9. 523 × 45
Break it down:
First, 523 × 5 = 2615
Then, 523 × 40 = 20920 (because 523 × 4 = 2092, then add a zero)
Add them: 2615 + 20920 = 23535
→ 23535

10. 720 × 19
720 × 10 = 7200
720 × 9 = 6480
Add: 7200 + 6480 = 13680
→ 13680

11. 753 × 13
753 × 3 = 2259
753 × 10 = 7530
Add: 2259 + 7530 = 9789
→ 9789

12. 580 × 18
580 × 10 = 5800
580 × 8 = 4640
Add: 5800 + 4640 = 10440
→ 10440

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Division Problems:

13. 183 ÷ 9
9 × 20 = 180 → remainder 3
So, 20 with remainder 3 → or as mixed number: 20 R3
But since this is likely expecting whole number quotient and remainder:
→ 20 R3

Let me check: 9 × 20 = 180, 183 - 180 = 3 → correct.

14. 960 ÷ 6
6 × 160 = 960 → exactly
→ 160

15. 158 ÷ 10
10 × 15 = 150 → remainder 8
→ 15 R8

16. 165 ÷ 11
11 × 15 = 165 → exactly
→ 15

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Final Answer:

Addition:
- 363 + 125 = 488
- 273 + 351 = 624
- 958 + 345 = 1303
- 428 + 239 = 667

Subtraction:
- 562 - 280 = 282
- 623 - 245 = 378
- 125 - 109 = 16
- 625 - 538 = 87

Multiplication:
- 523 × 45 = 23535
- 720 × 19 = 13680
- 753 × 13 = 9789
- 580 × 18 = 10440

Division:
- 183 ÷ 9 = 20 R3
- 960 ÷ 6 = 160
- 158 ÷ 10 = 15 R8
- 165 ÷ 11 = 15