Let’s solve each multiplication problem one by one. We’ll multiply the dollar amount by the whole number, and remember to keep two decimal places (since it’s money).
---
Row 1:
1. $17.12 × 30
→ 17.12 × 30 = 513.60
*(Think: 17 × 30 = 510, and 0.12 × 30 = 3.60 → total 513.60)*
2. $14.48 × 47
→ Let’s break it:
14.48 × 40 = 579.20
14.48 × 7 = 101.36
Add: 579.20 + 101.36 =
680.56
3. $87.16 × 18
→ 87.16 × 10 = 871.60
87.16 × 8 = 697.28
Add: 871.60 + 697.28 =
1,568.88
4. $49.35 × 45
→ 49.35 × 40 = 1,974.00
49.35 × 5 = 246.75
Add: 1,974.00 + 246.75 =
2,220.75
---
Row 2:
5. $78.16 × 31
→ 78.16 × 30 = 2,344.80
78.16 × 1 = 78.16
Add: 2,344.80 + 78.16 =
2,422.96
6. $34.43 × 32
→ 34.43 × 30 = 1,032.90
34.43 × 2 = 68.86
Add: 1,032.90 + 68.86 =
1,101.76
7. $53.42 × 20
→ 53.42 × 2 = 106.84 → then ×10 =
1,068.40
8. $14.78 × 40
→ 14.78 × 4 = 59.12 → then ×10 =
591.20
---
Row 3:
9. $94.63 × 8
→ 94 × 8 = 752
0.63 × 8 = 5.04
Total: 752 + 5.04 =
757.04
10. $95.98 × 13
→ 95.98 × 10 = 959.80
95.98 × 3 = 287.94
Add: 959.80 + 287.94 =
1,247.74
11. $60.37 × 48
→ 60.37 × 50 = 3,018.50
Minus 60.37 × 2 = 120.74
So: 3,018.50 - 120.74 =
2,897.76
*(Alternative: 60.37 × 40 = 2,414.80; 60.37 × 8 = 482.96; sum = 2,897.76 — same result)*
12. $99.91 × 5
→ 100 × 5 = 500, minus 0.09 × 5 = 0.45 → 500 - 0.45 =
499.55
---
Row 4:
13. $74.78 × 28
→ 74.78 × 20 = 1,495.60
74.78 × 8 = 598.24
Add: 1,495.60 + 598.24 =
2,093.84
14. $58.49 × 14
→ 58.49 × 10 = 584.90
58.49 × 4 = 233.96
Add: 584.90 + 233.96 =
818.86
15. $53.73 × 10
→ Just add a zero:
537.30
16. $23.52 × 46
→ 23.52 × 40 = 940.80
23.52 × 6 = 141.12
Add: 940.80 + 141.12 =
1,081.92
---
Row 5:
17. $38.52 × 16
→ 38.52 × 10 = 385.20
38.52 × 6 = 231.12
Add: 385.20 + 231.12 =
616.32
18. $88.19 × 9
→ 88 × 9 = 792
0.19 × 9 = 1.71
Total: 792 + 1.71 =
793.71
19. $82.47 × 23
→ 82.47 × 20 = 1,649.40
82.47 × 3 = 247.41
Add: 1,649.40 + 247.41 =
1,896.81
20. $23.97 × 7
→ 23 × 7 = 161
0.97 × 7 = 6.79
Total: 161 + 6.79 =
167.79
---
Final Answer:
513.60, 680.56, 1568.88, 2220.75, 2422.96, 1101.76, 1068.40, 591.20, 757.04, 1247.74, 2897.76, 499.55, 2093.84, 818.86, 537.30, 1081.92, 616.32, 793.71, 1896.81, 167.79
Parent Tip: Review the logic above to help your child master the concept of worksheet on multiplication.