Multiply Decimals worksheet from Brighterly for math learning.

I'll solve each decimal multiplication problem step by step, checking my calculations carefully.

Problem 1: 90 × 0.8
- First multiply: 90 × 8 = 720
- Count decimal places in 0.8 (one decimal place)
- Move decimal one place left: 72.0 = 72

Problem 2: 35 × 0.07
- First multiply: 35 × 7 = 245
- Count decimal places in 0.07 (two decimal places)
- Move decimal two places left: 2.45

Problem 3: 9 × 0.06
- First multiply: 9 × 6 = 54
- Count decimal places in 0.06 (two decimal places)
- Move decimal two places left: 0.54

Problem 4: 35 × 0.1
- First multiply: 35 × 1 = 35
- Count decimal places in 0.1 (one decimal place)
- Move decimal one place left: 3.5

Problem 5: 23 × 0.2
- First multiply: 23 × 2 = 46
- Count decimal places in 0.2 (one decimal place)
- Move decimal one place left: 4.6

Problem 6: 29 × 0.1
- First multiply: 29 × 1 = 29
- Count decimal places in 0.1 (one decimal place)
- Move decimal one place left: 2.9

Problem 7: 11 × 0.01
- First multiply: 11 × 1 = 11
- Count decimal places in 0.01 (two decimal places)
- Move decimal two places left: 0.11

Problem 8: 81 × 0.06
- First multiply: 81 × 6 = 486
- Count decimal places in 0.06 (two decimal places)
- Move decimal two places left: 4.86

Problem 9: 86 × 0.05
- First multiply: 86 × 5 = 430
- Count decimal places in 0.05 (two decimal places)
- Move decimal two places left: 4.30 = 4.3

Problem 10: 89 × 0.5
- First multiply: 89 × 5 = 445
- Count decimal places in 0.5 (one decimal place)
- Move decimal one place left: 44.5

Problem 11: 51 × 0.04
- First multiply: 51 × 4 = 204
- Count decimal places in 0.04 (two decimal places)
- Move decimal two places left: 2.04

Problem 12: 26 × 0.05
- First multiply: 26 × 5 = 130
- Count decimal places in 0.05 (two decimal places)
- Move decimal two places left: 1.30 = 1.3

Problem 13: 78 × 0.09
- First multiply: 78 × 9 = 702
- Count decimal places in 0.09 (two decimal places)
- Move decimal two places left: 7.02

Problem 14: 87 × 0.07
- First multiply: 87 × 7 = 609
- Count decimal places in 0.07 (two decimal places)
- Move decimal two places left: 6.09

Problem 15: 14 × 0.06
- First multiply: 14 × 6 = 84
- Count decimal places in 0.06 (two decimal places)
- Move decimal two places left: 0.84

Problem 16: 57 × 0.05
- First multiply: 57 × 5 = 285
- Count decimal places in 0.05 (two decimal places)
- Move decimal two places left: 2.85

Problem 17: 53 × 0.4
- First multiply: 53 × 4 = 212
- Count decimal places in 0.4 (one decimal place)
- Move decimal one place left: 21.2

Problem 18: 37 × 0.2
- First multiply: 37 × 2 = 74
- Count decimal places in 0.2 (one decimal place)
- Move decimal one place left: 7.4

Problem 19: 54 × 0.02
- First multiply: 54 × 2 = 108
- Count decimal places in 0.02 (two decimal places)
- Move decimal two places left: 1.08

Problem 20: 73 × 0.8
- First multiply: 73 × 8 = 584
- Count decimal places in 0.8 (one decimal place)
- Move decimal one place left: 58.4

Final Answer:
1. 72
2. 2.45
3. 0.54
4. 3.5
5. 4.6
6. 2.9
7. 0.11
8. 4.86
9. 4.3
10. 44.5
11. 2.04
12. 1.3
13. 7.02
14. 6.09
15. 0.84
16. 2.85
17. 21.2
18. 7.4
19. 1.08
20. 58.4