Multiply 3-digit by 1-digit Numbers Worksheets for 5th Graders ... - Free Printable

Let's solve each of the multiplication problems on the worksheet step by step. The task is to multiply a 3-digit number by a 1-digit number.

We'll go through each one:

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Row 1

1. 381 × 3
- 300 × 3 = 900
- 80 × 3 = 240
- 1 × 3 = 3
- Total: 900 + 240 + 3 = 1,143

2. 303 × 5
- 300 × 5 = 1,500
- 0 × 5 = 0
- 3 × 5 = 15
- Total: 1,500 + 0 + 15 = 1,515

3. 351 × 2
- 300 × 2 = 600
- 50 × 2 = 100
- 1 × 2 = 2
- Total: 600 + 100 + 2 = 702

4. 109 × 4
- 100 × 4 = 400
- 0 × 4 = 0
- 9 × 4 = 36
- Total: 400 + 0 + 36 = 436

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Row 2

5. 337 × 6
- 300 × 6 = 1,800
- 30 × 6 = 180
- 7 × 6 = 42
- Total: 1,800 + 180 + 42 = 2,022

6. 540 × 9
- 500 × 9 = 4,500
- 40 × 9 = 360
- 0 × 9 = 0
- Total: 4,500 + 360 + 0 = 4,860

7. 181 × 7
- 100 × 7 = 700
- 80 × 7 = 560
- 1 × 7 = 7
- Total: 700 + 560 + 7 = 1,267

8. 254 × 8
- 200 × 8 = 1,600
- 50 × 8 = 400
- 4 × 8 = 32
- Total: 1,600 + 400 + 32 = 2,032

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Row 3

9. 620 × 2
- 600 × 2 = 1,200
- 20 × 2 = 40
- 0 × 2 = 0
- Total: 1,200 + 40 + 0 = 1,240

10. 647 × 5
- 600 × 5 = 3,000
- 40 × 5 = 200
- 7 × 5 = 35
- Total: 3,000 + 200 + 35 = 3,235

11. 589 × 4
- 500 × 4 = 2,000
- 80 × 4 = 320
- 9 × 4 = 36
- Total: 2,000 + 320 + 36 = 2,356

12. 729 × 3
- 700 × 3 = 2,100
- 20 × 3 = 60
- 9 × 3 = 27
- Total: 2,100 + 60 + 27 = 2,187

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Row 4

13. 677 × 8
- 600 × 8 = 4,800
- 70 × 8 = 560
- 7 × 8 = 56
- Total: 4,800 + 560 + 56 = 5,416

14. 798 × 6
- 700 × 6 = 4,200
- 90 × 6 = 540
- 8 × 6 = 48
- Total: 4,200 + 540 + 48 = 4,788

15. 597 × 7
- 500 × 7 = 3,500
- 90 × 7 = 630
- 7 × 7 = 49
- Total: 3,500 + 630 + 49 = 4,179

16. 709 × 9
- 700 × 9 = 6,300
- 0 × 9 = 0
- 9 × 9 = 81
- Total: 6,300 + 0 + 81 = 6,381

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✔ Final Answers:

Here are all the solutions:

```
1. 381 × 3 = 1,143
2. 303 × 5 = 1,515
3. 351 × 2 = 702
4. 109 × 4 = 436
5. 337 × 6 = 2,022
6. 540 × 9 = 4,860
7. 181 × 7 = 1,267
8. 254 × 8 = 2,032
9. 620 × 2 = 1,240
10. 647 × 5 = 3,235
11. 589 × 4 = 2,356
12. 729 × 3 = 2,187
13. 677 × 8 = 5,416
14. 798 × 6 = 4,788
15. 597 × 7 = 4,179
16. 709 × 9 = 6,381
```

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🔍 Explanation:

To multiply a 3-digit number by a 1-digit number:
- Break the 3-digit number into hundreds, tens, and ones.
- Multiply each part by the 1-digit number.
- Add the results together.

For example:
381 × 3 → (300×3) + (80×3) + (1×3) = 900 + 240 + 3 = 1,143

This method uses distributive property of multiplication:
a × (b + c + d) = a×b + a×c + a×d

You can also use standard vertical multiplication for practice.

Let me know if you'd like this formatted as a printable answer sheet!