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:
| Problem | Answer |
|---------------|--------|
| 381 × 3 | 1,143 |
| 303 × 5 | 1,515 |
| 351 × 2 | 702 |
| 109 × 4 | 436 |
| 337 × 6 | 2,022 |
| 540 × 9 | 4,860 |
| 181 × 7 | 1,267 |
| 254 × 8 | 2,032 |
| 620 × 2 | 1,240 |
| 647 × 5 | 3,235 |
| 589 × 4 | 2,356 |
| 729 × 3 | 2,187 |
| 677 × 8 | 5,416 |
| 798 × 6 | 4,788 |
| 597 × 7 | 4,179 |
| 709 × 9 | 6,381 |
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📝 Explanation:
To multiply a 3-digit number by a 1-digit number:
1. Break the 3-digit number into hundreds, tens, and ones.
2. Multiply each part by the 1-digit number.
3. 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.
Let me know if you'd like this in printable format or with steps shown for each!
Parent Tip: Review the logic above to help your child master the concept of 4 5 grade math worksheet.
