Multiply by 12, 16, 18 and 24 Worksheet

Maths tricks trick 19: Factor chains for multiplying · Set 480 · 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. 1.29 × 15 =
2. 2.15 × 18 =
3. 3.17 × 15 =
4. 4.23 × 12 =
5. 5.18 × 14 =
6. 6.40 × 15 =
7. 7.48 × 16 =
8. 8.45 × 18 =
9. 9.12 × 18 =
10. 10.24 × 24 =
11. 11.38 × 18 =
12. 12.32 × 16 =
13. 13.13 × 24 =
14. 14.32 × 24 =
15. 15.12 × 12 =
16. 16.49 × 15 =
17. 17.14 × 15 =
18. 18.19 × 12 =
19. 19.39 × 15 =
20. 20.34 × 12 =
21. 21.31 × 18 =
22. 22.46 × 12 =
23. 23.34 × 16 =
24. 24.27 × 14 =
25. 25.18 × 16 =
26. 26.42 × 18 =
27. 27.17 × 18 =
28. 28.20 × 12 =
29. 29.18 × 24 =
30. 30.26 × 12 =
31. 31.16 × 12 =
32. 32.47 × 14 =
33. 33.46 × 16 =
34. 34.45 × 12 =
35. 35.27 × 24 =
36. 36.32 × 14 =
37. 37.15 × 14 =
38. 38.31 × 12 =
39. 39.33 × 12 =
40. 40.15 × 24 =

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