Decimal multiplication worksheet for practicing multiplication of decimal numbers.

Let's solve each of the decimal multiplication problems step by step.

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Understanding Decimal Multiplication

When multiplying decimals:
1. Ignore the decimal points and multiply as if they were whole numbers.
2. Count the total number of decimal places in both numbers.
3. Place the decimal point in the product so that it has the same number of decimal places as the total from step 2.

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We'll go through each problem:

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#### Row 1:

1. $ 0.1 \times 0.8 $
- $ 1 \times 8 = 8 $
- Total decimal places: 1 + 1 = 2
- Answer: 0.08

2. $ 0.7 \times 0.9 $
- $ 7 \times 9 = 63 $
- Decimal places: 2 → 0.63

3. $ 0.9 \times 0.2 $
- $ 9 \times 2 = 18 $
- Decimal places: 2 → 0.18

4. $ 0.6 \times 0.8 $
- $ 6 \times 8 = 48 $
- Decimal places: 2 → 0.48

5. $ 0.6 \times 0.5 $
- $ 6 \times 5 = 30 $
- Decimal places: 2 → 0.30 or 0.3

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#### Row 2:

6. $ 0.3 \times 0.5 $
- $ 3 \times 5 = 15 $
- Decimal places: 2 → 0.15

7. $ 0.2 \times 0.3 $
- $ 2 \times 3 = 6 $
- Decimal places: 2 → 0.06

8. $ 0.2 \times 0.2 $
- $ 2 \times 2 = 4 $
- Decimal places: 2 → 0.04

9. $ 0.5 \times 0.2 $
- $ 5 \times 2 = 10 $
- Decimal places: 2 → 0.10 or 0.1

10. $ 0.9 \times 0.3 $
- $ 9 \times 3 = 27 $
- Decimal places: 2 → 0.27

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#### Row 3:

11. $ 0.8 \times 0.9 $
- $ 8 \times 9 = 72 $
- Decimal places: 2 → 0.72

12. $ 0.9 \times 0.5 $
- $ 9 \times 5 = 45 $
- Decimal places: 2 → 0.45

13. $ 0.2 \times 0.9 $
- $ 2 \times 9 = 18 $
- Decimal places: 2 → 0.18

14. $ 0.1 \times 0.4 $
- $ 1 \times 4 = 4 $
- Decimal places: 2 → 0.04

15. $ 0.1 \times 0.8 $
- $ 1 \times 8 = 8 $
- Decimal places: 2 → 0.08

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#### Row 4:

16. $ 0.6 \times 0.6 $
- $ 6 \times 6 = 36 $
- Decimal places: 2 → 0.36

17. $ 0.9 \times 0.1 $
- $ 9 \times 1 = 9 $
- Decimal places: 2 → 0.09

18. $ 0.4 \times 0.4 $
- $ 4 \times 4 = 16 $
- Decimal places: 2 → 0.16

19. $ 0.5 \times 0.4 $
- $ 5 \times 4 = 20 $
- Decimal places: 2 → 0.20 or 0.2

20. $ 0.9 \times 0.8 $
- $ 9 \times 8 = 72 $
- Decimal places: 2 → 0.72

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#### Row 5:

21. $ 0.1 \times 0.9 $
- $ 1 \times 9 = 9 $
- Decimal places: 2 → 0.09

22. $ 0.2 \times 0.1 $
- $ 2 \times 1 = 2 $
- Decimal places: 2 → 0.02

23. $ 0.1 \times 0.3 $
- $ 1 \times 3 = 3 $
- Decimal places: 2 → 0.03

24. $ 0.4 \times 0.6 $
- $ 4 \times 6 = 24 $
- Decimal places: 2 → 0.24

25. $ 0.7 \times 0.1 $
- $ 7 \times 1 = 7 $
- Decimal places: 2 → 0.07

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#### Row 6:

26. $ 0.2 \times 0.9 $
- $ 2 \times 9 = 18 $
- Decimal places: 2 → 0.18

27. $ 0.8 \times 0.8 $
- $ 8 \times 8 = 64 $
- Decimal places: 2 → 0.64

28. $ 0.6 \times 0.8 $
- $ 6 \times 8 = 48 $
- Decimal places: 2 → 0.48

29. $ 0.6 \times 0.4 $
- $ 6 \times 4 = 24 $
- Decimal places: 2 → 0.24

30. $ 0.1 \times 0.1 $
- $ 1 \times 1 = 1 $
- Decimal places: 2 → 0.01

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✔ Final Answers (in order):

```
0.08 0.63 0.18 0.48 0.30
0.15 0.06 0.04 0.10 0.27
0.72 0.45 0.18 0.04 0.08
0.36 0.09 0.16 0.20 0.72
0.09 0.02 0.03 0.24 0.07
0.18 0.64 0.48 0.24 0.01
```

> Note: Some answers like 0.30, 0.10, 0.20 are written as 0.3, 0.1, 0.2 for simplicity, but technically, keeping two decimal places is fine depending on the requirement.

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🔍 Summary Tip:

- When multiplying decimals, count decimal places to place the decimal correctly.
- Practice helps build fluency with decimal multiplication.

Let me know if you'd like a printable version or explanation with visual models!