Multiply by 12, 16, 18 and 24 Worksheet

Maths tricks trick 19: Factor chains for multiplying · Set 95 · 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. 1.21 × 12 =
2. 2.35 × 24 =
3. 3.29 × 24 =
4. 4.49 × 15 =
5. 5.14 × 24 =
6. 6.38 × 12 =
7. 7.36 × 16 =
8. 8.29 × 18 =
9. 9.12 × 15 =
10. 10.35 × 12 =
11. 11.49 × 24 =
12. 12.13 × 15 =
13. 13.39 × 18 =
14. 14.18 × 15 =
15. 15.48 × 18 =
16. 16.19 × 18 =
17. 17.42 × 12 =
18. 18.11 × 16 =
19. 19.19 × 24 =
20. 20.34 × 12 =
21. 21.15 × 14 =
22. 22.45 × 24 =
23. 23.22 × 18 =
24. 24.20 × 12 =
25. 25.45 × 15 =
26. 26.41 × 18 =
27. 27.16 × 16 =
28. 28.29 × 14 =
29. 29.12 × 14 =
30. 30.46 × 18 =
31. 31.36 × 14 =
32. 32.38 × 16 =
33. 33.45 × 14 =
34. 34.25 × 12 =
35. 35.41 × 15 =
36. 36.34 × 15 =
37. 37.20 × 15 =
38. 38.27 × 12 =
39. 39.31 × 14 =
40. 40.24 × 15 =

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