Multiply by 12, 16, 18 and 24 Worksheet

Maths tricks trick 19: Factor chains for multiplying · Set 487 · 40 questions

The trick (Chain the factors): Split the multiplier into two small factors: 12 = 3 × 4, 14 = 2 × 7, 15 = 3 × 5, 16 = 4 × 4, 18 = 2 × 9, 24 = 4 × 6. Multiply by the first factor. Multiply that answer by the second factor (× 4 is double, double).

1. 1.33 × 14 =
2. 2.13 × 15 =
3. 3.15 × 24 =
4. 4.30 × 15 =
5. 5.49 × 18 =
6. 6.20 × 12 =
7. 7.16 × 12 =
8. 8.42 × 24 =
9. 9.29 × 16 =
10. 10.40 × 16 =
11. 11.22 × 15 =
12. 12.39 × 15 =
13. 13.28 × 24 =
14. 14.17 × 14 =
15. 15.19 × 24 =
16. 16.44 × 24 =
17. 17.49 × 15 =
18. 18.38 × 14 =
19. 19.48 × 24 =
20. 20.25 × 18 =
21. 21.47 × 16 =
22. 22.33 × 24 =
23. 23.41 × 16 =
24. 24.33 × 18 =
25. 25.15 × 18 =
26. 26.24 × 15 =
27. 27.20 × 16 =
28. 28.43 × 12 =
29. 29.48 × 12 =
30. 30.32 × 24 =
31. 31.30 × 24 =
32. 32.23 × 18 =
33. 33.49 × 14 =
34. 34.17 × 24 =
35. 35.19 × 16 =
36. 36.13 × 12 =
37. 37.45 × 12 =
38. 38.11 × 14 =
39. 39.22 × 24 =
40. 40.18 × 15 =

Free maths tricks lessons, practice and worksheets at talentjr.in/maths-tricks