Multiply by 12, 16, 18 and 24 Worksheet

Maths tricks trick 19: Factor chains for multiplying · Set 649 · 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. 1.31 × 18 =
2. 2.15 × 16 =
3. 3.27 × 14 =
4. 4.32 × 12 =
5. 5.45 × 14 =
6. 6.11 × 14 =
7. 7.24 × 16 =
8. 8.23 × 18 =
9. 9.41 × 12 =
10. 10.16 × 14 =
11. 11.16 × 12 =
12. 12.35 × 18 =
13. 13.22 × 24 =
14. 14.38 × 12 =
15. 15.31 × 14 =
16. 16.29 × 15 =
17. 17.48 × 18 =
18. 18.25 × 15 =
19. 19.19 × 15 =
20. 20.19 × 12 =
21. 21.16 × 16 =
22. 22.47 × 18 =
23. 23.17 × 18 =
24. 24.23 × 16 =
25. 25.23 × 14 =
26. 26.49 × 24 =
27. 27.39 × 24 =
28. 28.27 × 12 =
29. 29.15 × 15 =
30. 30.18 × 12 =
31. 31.29 × 18 =
32. 32.17 × 12 =
33. 33.20 × 14 =
34. 34.24 × 12 =
35. 35.15 × 24 =
36. 36.14 × 16 =
37. 37.34 × 18 =
38. 38.44 × 14 =
39. 39.31 × 24 =
40. 40.28 × 12 =

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