Let's solve each multiplication problem step by step. We are multiplying
decimals by
1-digit numbers. The key rule to remember is:
> Multiply as if they were whole numbers, then place the decimal point in the product so that the total number of decimal places in the product equals the sum of decimal places in the factors.
---
1. $ 0.4 \times 6 $
- $ 4 \times 6 = 24 $
- 0.4 has
1 decimal place, so the answer should have 1 decimal place.
- $ 0.4 \times 6 = 2.4 $
✔ Answer: 2.4
---
2. $ 0.1 \times 8 $
- $ 1 \times 8 = 8 $
- 0.1 has
1 decimal place
- $ 0.1 \times 8 = 0.8 $
✔ Answer: 0.8
---
3. $ 1.3 \times 6 $
- $ 13 \times 6 = 78 $
- 1.3 has
1 decimal place
- So, $ 1.3 \times 6 = 7.8 $
✔ Answer: 7.8
---
4. $ 4.4 \times 5 $
- $ 44 \times 5 = 220 $
- 4.4 has
1 decimal place
- So, $ 4.4 \times 5 = 22.0 $ → which is just
22.0 or
22
✔ Answer: 22.0 (or 22)
---
5. $ 0.58 \times 2 $
- $ 58 \times 2 = 116 $
- 0.58 has
2 decimal places
- So, $ 0.58 \times 2 = 1.16 $
✔ Answer: 1.16
---
6. $ 0.86 \times 4 $
- $ 86 \times 4 = 344 $
- 0.86 has
2 decimal places
- So, $ 0.86 \times 4 = 3.44 $
✔ Answer: 3.44
---
7. $ 40.4 \times 2 $
- $ 404 \times 2 = 808 $
- 40.4 has
1 decimal place
- So, $ 40.4 \times 2 = 80.8 $
✔ Answer: 80.8
---
8. $ 11.1 \times 3 $
- $ 111 \times 3 = 333 $
- 11.1 has
1 decimal place
- So, $ 11.1 \times 3 = 33.3 $
✔ Answer: 33.3
---
9. $ 4.45 \times 7 $
- $ 445 \times 7 = 3115 $
- 4.45 has
2 decimal places
- So, $ 4.45 \times 7 = 31.15 $
✔ Answer: 31.15
---
10. $ 8.02 \times 9 $
- $ 802 \times 9 = 7218 $
- 8.02 has
2 decimal places
- So, $ 8.02 \times 9 = 72.18 $
✔ Answer: 72.18
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✔ Final Answers:
1. $ 0.4 \times 6 = 2.4 $
2. $ 0.1 \times 8 = 0.8 $
3. $ 1.3 \times 6 = 7.8 $
4. $ 4.4 \times 5 = 22.0 $
5. $ 0.58 \times 2 = 1.16 $
6. $ 0.86 \times 4 = 3.44 $
7. $ 40.4 \times 2 = 80.8 $
8. $ 11.1 \times 3 = 33.3 $
9. $ 4.45 \times 7 = 31.15 $
10. $ 8.02 \times 9 = 72.18 $
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Parent Tip: Review the logic above to help your child master the concept of decimal multiplication worksheet 1.
