Decimal multiplication worksheet featuring nine exercises for multiplying decimals by whole numbers.

Let’s solve each multiplication problem one by one. We’re multiplying decimals by whole numbers — just like regular multiplication, but we keep the decimal point in the right place.

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Problem 1: 16.0 × 8

Think of it as 16 × 8 = 128
Since 16.0 has one decimal place, and 8 is a whole number, the answer keeps one decimal place → 128.0

✔ Check: 16 × 8 = 128 → so 16.0 × 8 = 128.0

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Problem 2: 45.3 × 4

Multiply 453 × 4 = 1812
Now, since 45.3 has one decimal place, put the decimal back → 181.2

✔ Check: 45 × 4 = 180, and 0.3 × 4 = 1.2 → 180 + 1.2 = 181.2

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Problem 3: 14.7 × 2

147 × 2 = 294
One decimal place → 29.4

✔ Check: 14 × 2 = 28, 0.7 × 2 = 1.4 → 28 + 1.4 = 29.4

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Problem 4: 39.9 × 3

399 × 3 = 1197
One decimal place → 119.7

✔ Check: 40 × 3 = 120, minus 0.1 × 3 = 0.3 → 120 - 0.3 = 119.7

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Problem 5: 75.1 × 9

751 × 9 = 6759
One decimal place → 675.9

✔ Check: 75 × 9 = 675, 0.1 × 9 = 0.9 → 675 + 0.9 = 675.9

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Problem 6: 14.9 × 5

149 × 5 = 745
One decimal place → 74.5

✔ Check: 15 × 5 = 75, minus 0.1 × 5 = 0.5 → 75 - 0.5 = 74.5

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Problem 7: 58.0 × 5

58 × 5 = 290
One decimal place → 290.0

✔ Check: 50 × 5 = 250, 8 × 5 = 40 → 250 + 40 = 290 → so 290.0

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Problem 8: 89.9 × 4

899 × 4 = 3596
One decimal place → 359.6

✔ Check: 90 × 4 = 360, minus 0.1 × 4 = 0.4 → 360 - 0.4 = 359.6

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Problem 9: 23.3 × 1

Anything times 1 is itself → 23.3

✔ Check: No change needed.

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Final Answers:

1. 128.0
2. 181.2
3. 29.4
4. 119.7
5. 675.9
6. 74.5
7. 290.0
8. 359.6
9. 23.3

Final Answer:
128.0, 181.2, 29.4, 119.7, 675.9, 74.5, 290.0, 359.6, 23.3