Decimal multiplication worksheets featuring nine problems where decimals are multiplied by whole numbers.

Let’s solve each problem one by one. We’re multiplying decimals by whole numbers. The trick is to ignore the decimal at first, multiply as if they’re whole numbers, then put the decimal back in the right place — same number of digits after the decimal as in the original decimal number.

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Problem 1: 16.0 × 8

- 16.0 has 1 digit after the decimal (the .0).
- Multiply 160 × 8 = 1280
- Now put the decimal back so there’s 1 digit after it → 128.0
- But 128.0 is just 128

✔ Answer: 128

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Problem 2: 45.3 × 4

- 45.3 has 1 digit after the decimal.
- Multiply 453 × 4:
- 400×4=1600
- 50×4=200
- 3×4=12
- Total: 1600+200+12 = 1812
- Put decimal back with 1 digit after → 181.2

✔ Answer: 181.2

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Problem 3: 14.7 × 2

- 14.7 has 1 digit after decimal.
- 147 × 2 = 294
- Put decimal back → 29.4

✔ Answer: 29.4

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Problem 4: 39.9 × 3

- 39.9 has 1 digit after decimal.
- 399 × 3:
- 400×3=1200, minus 1×3=3 → 1197
- Put decimal back → 119.7

✔ Answer: 119.7

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Problem 5: 75.1 × 9

- 75.1 has 1 digit after decimal.
- 751 × 9:
- 700×9=6300
- 50×9=450
- 1×9=9
- Total: 6300+450=6750 +9 = 6759
- Put decimal back → 675.9

✔ Answer: 675.9

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Problem 6: 14.9 × 5

- 14.9 has 1 digit after decimal.
- 149 × 5:
- 150×5=750, minus 1×5=5 → 745
- Put decimal back → 74.5

✔ Answer: 74.5

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Problem 7: 58.0 × 5

- 58.0 has 1 digit after decimal.
- 580 × 5 = 2900
- Put decimal back → 290.0 → which is 290

✔ Answer: 290

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Problem 8: 89.9 × 4

- 89.9 has 1 digit after decimal.
- 899 × 4:
- 900×4=3600, minus 1×4=4 → 3596
- Put decimal back → 359.6

✔ Answer: 359.6

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Problem 9: 23.3 × 1

- Any number times 1 is itself.
- So 23.3 × 1 = 23.3

✔ Answer: 23.3

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Final Answer:
1. 128
2. 181.2
3. 29.4
4. 119.7
5. 675.9
6. 74.5
7. 290
8. 359.6
9. 23.3