2-Digit Multiplication Practice Worksheet

You've uploaded a worksheet titled “2 Digit Multiplication”, which asks students to multiply two-digit numbers by one-digit numbers and find the product.

Let’s solve all 20 problems step-by-step, and then I’ll provide the complete answer key.

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🔢 Problem Set: 2-Digit × 1-Digit Multiplication

#### Row 1
1. 10 × 4
→ 10 × 4 = 40

2. 13 × 3
→ 10×3 = 30, 3×3 = 9 → 30 + 9 = 39

3. 11 × 5
→ 10×5 = 50, 1×5 = 5 → 50 + 5 = 55

4. 11 × 3
→ 10×3 = 30, 1×3 = 3 → 30 + 3 = 33

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#### Row 2
5. 30 × 3
→ 30 × 3 = 90

6. 11 × 2
→ 10×2 = 20, 1×2 = 2 → 20 + 2 = 22

7. 12 × 4
→ 10×4 = 40, 2×4 = 8 → 40 + 8 = 48

8. 10 × 5
→ 10 × 5 = 50

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#### Row 3
9. 12 × 3
→ 10×3 = 30, 2×3 = 6 → 30 + 6 = 36

10. 14 × 2
→ 10×2 = 20, 4×2 = 8 → 20 + 8 = 28

11. 34 × 2
→ 30×2 = 60, 4×2 = 8 → 60 + 8 = 68

12. 31 × 2
→ 30×2 = 60, 1×2 = 2 → 60 + 2 = 62

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#### Row 4
13. 23 × 3
→ 20×3 = 60, 3×3 = 9 → 60 + 9 = 69

14. 41 × 2
→ 40×2 = 80, 1×2 = 2 → 80 + 2 = 82

15. 21 × 4
→ 20×4 = 80, 1×4 = 4 → 80 + 4 = 84

16. 33 × 3
→ 30×3 = 90, 3×3 = 9 → 90 + 9 = 99

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#### Row 5
17. 90 × 1
→ Any number × 1 is itself → 90

18. 44 × 2
→ 40×2 = 80, 4×2 = 8 → 80 + 8 = 88

19. 11 × 4
→ 10×4 = 40, 1×4 = 4 → 40 + 4 = 44

20. 21 × 2
→ 20×2 = 40, 1×2 = 2 → 40 + 2 = 42

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## ✔ Final Answer Key:

| Problem # | Product |
|-----------|---------|
| 1 | 40 |
| 2 | 39 |
| 3 | 55 |
| 4 | 33 |
| 5 | 90 |
| 6 | 22 |
| 7 | 48 |
| 8 | 50 |
| 9 | 36 |
| 10 | 28 |
| 11 | 68 |
| 12 | 62 |
| 13 | 69 |
| 14 | 82 |
| 15 | 84 |
| 16 | 99 |
| 17 | 90 |
| 18 | 88 |
| 19 | 44 |
| 20 | 42 |

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## 📝 Teaching Tip:
This worksheet helps students practice breaking down multiplication using place value (e.g., 13 × 3 = (10 × 3) + (3 × 3)). It reinforces mental math and prepares them for multi-digit multiplication with regrouping.

Let me know if you’d like this as a printable answer sheet or want to see the work shown vertically (like in standard algorithm form)!