Multiplying Decimals by Whole Number worksheet - Free Printable

Problem: Multiply Various Decimals by 1-Digit Whole Numbers

The task is to calculate the product of each decimal number and its corresponding 1-digit whole number. Let's solve each multiplication step by step.

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#### First Row:
1. 0.60 × 5
- Multiply as if they are whole numbers: \( 60 \times 5 = 300 \).
- The original number \( 0.60 \) has 2 decimal places.
- Place the decimal point in the result so that it has 2 decimal places: \( 3.00 \).
- Answer: \( 3.00 \).

2. 0.186 × 8
- Multiply as if they are whole numbers: \( 186 \times 8 = 1488 \).
- The original number \( 0.186 \) has 3 decimal places.
- Place the decimal point in the result so that it has 3 decimal places: \( 1.488 \).
- Answer: \( 1.488 \).

3. 0.075 × 2
- Multiply as if they are whole numbers: \( 75 \times 2 = 150 \).
- The original number \( 0.075 \) has 3 decimal places.
- Place the decimal point in the result so that it has 3 decimal places: \( 0.150 \).
- Answer: \( 0.150 \).

4. 6.4 × 3
- Multiply as if they are whole numbers: \( 64 \times 3 = 192 \).
- The original number \( 6.4 \) has 1 decimal place.
- Place the decimal point in the result so that it has 1 decimal place: \( 19.2 \).
- Answer: \( 19.2 \).

5. 0.660 × 9
- Multiply as if they are whole numbers: \( 660 \times 9 = 5940 \).
- The original number \( 0.660 \) has 3 decimal places.
- Place the decimal point in the result so that it has 3 decimal places: \( 5.940 \).
- Answer: \( 5.940 \).

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#### Second Row:
6. 5.1 × 6
- Multiply as if they are whole numbers: \( 51 \times 6 = 306 \).
- The original number \( 5.1 \) has 1 decimal place.
- Place the decimal point in the result so that it has 1 decimal place: \( 30.6 \).
- Answer: \( 30.6 \).

7. 94.3 × 8
- Multiply as if they are whole numbers: \( 943 \times 8 = 7544 \).
- The original number \( 94.3 \) has 1 decimal place.
- Place the decimal point in the result so that it has 1 decimal place: \( 754.4 \).
- Answer: \( 754.4 \).

8. 6.8 × 5
- Multiply as if they are whole numbers: \( 68 \times 5 = 340 \).
- The original number \( 6.8 \) has 1 decimal place.
- Place the decimal point in the result so that it has 1 decimal place: \( 34.0 \).
- Answer: \( 34.0 \).

9. 2.59 × 2
- Multiply as if they are whole numbers: \( 259 \times 2 = 518 \).
- The original number \( 2.59 \) has 2 decimal places.
- Place the decimal point in the result so that it has 2 decimal places: \( 5.18 \).
- Answer: \( 5.18 \).

10. 0.80 × 7
- Multiply as if they are whole numbers: \( 80 \times 7 = 560 \).
- The original number \( 0.80 \) has 2 decimal places.
- Place the decimal point in the result so that it has 2 decimal places: \( 5.60 \).
- Answer: \( 5.60 \).

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#### Third Row:
11. 0.15 × 4
- Multiply as if they are whole numbers: \( 15 \times 4 = 60 \).
- The original number \( 0.15 \) has 2 decimal places.
- Place the decimal point in the result so that it has 2 decimal places: \( 0.60 \).
- Answer: \( 0.60 \).

12. 8.7 × 5
- Multiply as if they are whole numbers: \( 87 \times 5 = 435 \).
- The original number \( 8.7 \) has 1 decimal place.
- Place the decimal point in the result so that it has 1 decimal place: \( 43.5 \).
- Answer: \( 43.5 \).

13. 0.42 × 3
- Multiply as if they are whole numbers: \( 42 \times 3 = 126 \).
- The original number \( 0.42 \) has 2 decimal places.
- Place the decimal point in the result so that it has 2 decimal places: \( 0.126 \).
- Answer: \( 0.126 \).

14. 71.8 × 6
- Multiply as if they are whole numbers: \( 718 \times 6 = 4308 \).
- The original number \( 71.8 \) has 1 decimal place.
- Place the decimal point in the result so that it has 1 decimal place: \( 430.8 \).
- Answer: \( 430.8 \).

15. 0.558 × 8
- Multiply as if they are whole numbers: \( 558 \times 8 = 4464 \).
- The original number \( 0.558 \) has 3 decimal places.
- Place the decimal point in the result so that it has 3 decimal places: \( 4.464 \).
- Answer: \( 4.464 \).

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Final Answers:

\[
\begin{array}{ccccc}
3.00 & 1.488 & 0.150 & 19.2 & 5.940 \\
30.6 & 754.4 & 34.0 & 5.18 & 5.60 \\
0.60 & 43.5 & 0.126 & 430.8 & 4.464 \\
\end{array}
\]

\boxed{
\begin{array}{ccccc}
3.00 & 1.488 & 0.150 & 19.2 & 5.940 \\
30.6 & 754.4 & 34.0 & 5.18 & 5.60 \\
0.60 & 43.5 & 0.126 & 430.8 & 4.464 \\
\end{array}
}