Math worksheet for practicing multiplication in columns: 1-digit by 2-digit problems.

You've uploaded a worksheet titled “Multiply in column: 1 digit by 2 digit”. This is a standard multiplication practice sheet where each problem involves multiplying a two-digit number by a one-digit number using the column method (also known as vertical multiplication).

Let’s solve all 16 problems step by step and explain the process.

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✔ General Method (Column Multiplication):

1. Write the two-digit number on top, the one-digit number below, aligned to the right.
2. Multiply the one-digit number by the ones digit of the two-digit number.
3. Write the result under the line, carrying over any tens if needed.
4. Multiply the one-digit number by the tens digit of the two-digit number, then add any carry-over.
5. Write the final product.

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## 📝 Solutions:

Row 1:

1. 21 × 3
3 × 1 = 3
3 × 2 = 6
→ 63

2. 14 × 1
1 × 4 = 4
1 × 1 = 1
→ 14

3. 47 × 2
2 × 7 = 14 → write 4, carry 1
2 × 4 = 8 + 1 = 9
→ 94

4. 22 × 3
3 × 2 = 6
3 × 2 = 6
→ 66

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Row 2:

5. 25 × 6
6 × 5 = 30 → write 0, carry 3
6 × 2 = 12 + 3 = 15
→ 150

6. 35 × 8
8 × 5 = 40 → write 0, carry 4
8 × 3 = 24 + 4 = 28
→ 280

7. 89 × 7
7 × 9 = 63 → write 3, carry 6
7 × 8 = 56 + 6 = 62
→ 623

8. 36 × 8
8 × 6 = 48 → write 8, carry 4
8 × 3 = 24 + 4 = 28
→ 288

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Row 3:

9. 23 × 7
7 × 3 = 21 → write 1, carry 2
7 × 2 = 14 + 2 = 16
→ 161

10. 38 × 2
2 × 8 = 16 → write 6, carry 1
2 × 3 = 6 + 1 = 7
→ 76

11. 16 × 6
6 × 6 = 36 → write 6, carry 3
6 × 1 = 6 + 3 = 9
→ 96

12. 21 × 8
8 × 1 = 8
8 × 2 = 16
→ 168

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Row 4:

13. 92 × 2
2 × 2 = 4
2 × 9 = 18
→ 184

14. 98 × 7
7 × 8 = 56 → write 6, carry 5
7 × 9 = 63 + 5 = 68
→ 686

15. 20 × 3
3 × 0 = 0
3 × 2 = 6
→ 60

16. 47 × 7
7 × 7 = 49 → write 9, carry 4
7 × 4 = 28 + 4 = 32
→ 329

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## ✔ Final Answer Key:

| Problem | Answer |
|---------|--------|
| 21 × 3 | 63 |
| 14 × 1 | 14 |
| 47 × 2 | 94 |
| 22 × 3 | 66 |
| 25 × 6 | 150 |
| 35 × 8 | 280 |
| 89 × 7 | 623 |
| 36 × 8 | 288 |
| 23 × 7 | 161 |
| 38 × 2 | 76 |
| 16 × 6 | 96 |
| 21 × 8 | 168 |
| 92 × 2 | 184 |
| 98 × 7 | 686 |
| 20 × 3 | 60 |
| 47 × 7 | 329 |

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## 💡 Teaching Tip:
This worksheet helps students practice:
- Place value understanding
- Carrying over in multiplication
- Building fluency with basic multiplication facts

You can use this answer key to check student work or for self-study!

Let me know if you want a printable version or step-by-step visuals for any specific problem!