Multiplying Decimals by Whole Number worksheet - Free Printable

Let's solve each of the multiplication problems step by step. We are multiplying decimals by 1-digit whole numbers.

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Step-by-step Solutions:

#### 1. $ 0.60 \times 5 $
- Multiply as if they were whole numbers: $ 60 \times 5 = 300 $
- Count decimal places: 0.60 has 2 decimal places
- Place the decimal point: $ 3.00 $ → 3.00 or 3

✔ Answer: $ 3.00 $

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#### 2. $ 0.186 \times 8 $
- $ 186 \times 8 = 1488 $
- 0.186 has 3 decimal places
- So, place the decimal: $ 1.488 $

✔ Answer: $ 1.488 $

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#### 3. $ 0.075 \times 2 $
- $ 75 \times 2 = 150 $
- 0.075 has 3 decimal places
- So, $ 0.150 $ → 0.15

✔ Answer: $ 0.150 $ or 0.15

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#### 4. $ 6.4 \times 3 $
- $ 64 \times 3 = 192 $
- 6.4 has 1 decimal place
- So, $ 19.2 $

✔ Answer: $ 19.2 $

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#### 5. $ 0.660 \times 9 $
- $ 660 \times 9 = 5940 $
- 0.660 has 3 decimal places
- So, $ 5.940 $ → 5.94

✔ Answer: $ 5.940 $ or 5.94

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#### 6. $ 5.1 \times 6 $
- $ 51 \times 6 = 306 $
- 5.1 has 1 decimal place
- So, $ 30.6 $

✔ Answer: $ 30.6 $

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#### 7. $ 94.3 \times 8 $
- $ 943 \times 8 = 7544 $
- 94.3 has 1 decimal place
- So, $ 754.4 $

✔ Answer: $ 754.4 $

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#### 8. $ 6.8 \times 5 $
- $ 68 \times 5 = 340 $
- 6.8 has 1 decimal place
- So, $ 34.0 $

✔ Answer: $ 34.0 $ or 34

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#### 9. $ 2.59 \times 2 $
- $ 259 \times 2 = 518 $
- 2.59 has 2 decimal places
- So, $ 5.18 $

✔ Answer: $ 5.18 $

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#### 10. $ 0.80 \times 7 $
- $ 80 \times 7 = 560 $
- 0.80 has 2 decimal places
- So, $ 5.60 $ → 5.6

✔ Answer: $ 5.60 $ or 5.6

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#### 11. $ 0.15 \times 4 $
- $ 15 \times 4 = 60 $
- 0.15 has 2 decimal places
- So, $ 0.60 $

✔ Answer: $ 0.60 $

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#### 12. $ 8.7 \times 5 $
- $ 87 \times 5 = 435 $
- 8.7 has 1 decimal place
- So, $ 43.5 $

✔ Answer: $ 43.5 $

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#### 13. $ 0.42 \times 3 $
- $ 42 \times 3 = 126 $
- 0.42 has 2 decimal places
- So, $ 1.26 $

✔ Answer: $ 1.26 $

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#### 14. $ 71.8 \times 6 $
- $ 718 \times 6 = 4308 $
- 71.8 has 1 decimal place
- So, $ 430.8 $

✔ Answer: $ 430.8 $

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#### 15. $ 0.558 \times 8 $
- $ 558 \times 8 = 4464 $
- 0.558 has 3 decimal places
- So, $ 4.464 $

✔ Answer: $ 4.464 $

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✔ Final Answers:

| Problem | Answer |
|--------|--------|
| 1. $ 0.60 \times 5 $ | 3.00 |
| 2. $ 0.186 \times 8 $ | 1.488 |
| 3. $ 0.075 \times 2 $ | 0.150 |
| 4. $ 6.4 \times 3 $ | 19.2 |
| 5. $ 0.660 \times 9 $ | 5.940 |
| 6. $ 5.1 \times 6 $ | 30.6 |
| 7. $ 94.3 \times 8 $ | 754.4 |
| 8. $ 6.8 \times 5 $ | 34.0 |
| 9. $ 2.59 \times 2 $ | 5.18 |
| 10. $ 0.80 \times 7 $ | 5.60 |
| 11. $ 0.15 \times 4 $ | 0.60 |
| 12. $ 8.7 \times 5 $ | 43.5 |
| 13. $ 0.42 \times 3 $ | 1.26 |
| 14. $ 71.8 \times 6 $ | 430.8 |
| 15. $ 0.558 \times 8 $ | 4.464 |

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🔍 Key Tip for Multiplying Decimals:

- Ignore the decimal at first and multiply like whole numbers.
- Count how many decimal places are in the original decimal number.
- Place the decimal point in the answer so it has the same number of decimal places.

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