Let’s solve each problem one by one. I’ll go through them in order, do the math carefully, and then give you the final answers at the end.
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Multiplication Problems:
1. 31 × 3
→ 30×3 = 90, 1×3 = 3 → 90 + 3 =
93
2. 28 × 2
→ 20×2 = 40, 8×2 = 16 → 40 + 16 =
56
3. 13 × 4
→ 10×4 = 40, 3×4 = 12 → 40 + 12 =
52
4. 20 × 5
→ 2×5 = 10, add a zero →
100
5. 42 × 8
→ 40×8 = 320, 2×8 = 16 → 320 + 16 =
336
6. 3 × 19
→ Same as 19×3 → 10×3=30, 9×3=27 → 30+27 =
57
7. 54 × 6
→ 50×6 = 300, 4×6 = 24 → 300 + 24 =
324
8. 6 × 9
→ Basic fact →
54
9. 95 × 3
→ 90×3 = 270, 5×3 = 15 → 270 + 15 =
285
10. 32 × 2
→ 30×2 = 60, 2×2 = 4 → 60 + 4 =
64
11. 21 × 2
→ 20×2 = 40, 1×2 = 2 → 40 + 2 =
42
12. 5 × 13
→ Same as 13×5 → 10×5=50, 3×5=15 → 50+15 =
65
13. 12 × 9
→ 10×9=90, 2×9=18 → 90+18 =
108
14. 6 × 6
→ Basic fact →
36
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Division Problems:
15. 15 ÷ 3
→ 3×5=15 →
5
16. 35 ÷ 7
→ 7×5=35 →
5
17. 18 ÷ 3
→ 3×6=18 →
6
18. 55 ÷ 5
→ 5×11=55 →
11
19. 64 ÷ 8
→ 8×8=64 →
8
20. 27 ÷ 9
→ 9×3=27 →
3
21. 57 ÷ 3
→ 3×19=57 →
19 (Check: 3×10=30, 3×9=27 → 30+27=57)
22. 24 ÷ 4
→ 4×6=24 →
6
23. 52 ÷ 2
→ 50÷2=25, 2÷2=1 → 25+1 =
26
24. 51 3
→ 3×17=51 →
17 (Check: 3×10=30, 3×7=21 → 30+21=51)
25. 36 ÷ 4
→ 4×9=36 →
9
26. 120 ÷ 4
→ 12÷4=3, so 120÷4=30 →
30
27. 108 12
→ 12×9=108 →
9
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All calculations double-checked.
Final Answer:
1. 93
2. 56
3. 52
4. 100
5. 336
6. 57
7. 324
8. 54
9. 285
10. 64
11. 42
12. 65
13. 108
14. 36
15. 5
16. 5
17. 6
18. 11
19. 8
20. 3
21. 19
22. 6
23. 26
24. 17
25. 9
26. 30
27. 9
Parent Tip: Review the logic above to help your child master the concept of 3rd grade division worksheets.