Multiply by 12, 16, 18 and 24 Worksheet

Maths tricks trick 19: Factor chains for multiplying · Set 728 · 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. 1.39 × 18 =
2. 2.49 × 12 =
3. 3.43 × 14 =
4. 4.15 × 14 =
5. 5.35 × 14 =
6. 6.39 × 15 =
7. 7.34 × 12 =
8. 8.17 × 16 =
9. 9.39 × 12 =
10. 10.16 × 14 =
11. 11.12 × 15 =
12. 12.17 × 24 =
13. 13.42 × 14 =
14. 14.15 × 15 =
15. 15.49 × 16 =
16. 16.49 × 15 =
17. 17.14 × 15 =
18. 18.38 × 16 =
19. 19.16 × 12 =
20. 20.42 × 12 =
21. 21.22 × 12 =
22. 22.16 × 18 =
23. 23.24 × 15 =
24. 24.25 × 18 =
25. 25.21 × 12 =
26. 26.29 × 15 =
27. 27.18 × 18 =
28. 28.17 × 12 =
29. 29.31 × 14 =
30. 30.21 × 15 =
31. 31.21 × 14 =
32. 32.23 × 18 =
33. 33.35 × 12 =
34. 34.24 × 14 =
35. 35.12 × 24 =
36. 36.48 × 24 =
37. 37.41 × 12 =
38. 38.35 × 24 =
39. 39.12 × 18 =
40. 40.12 × 14 =

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