Multiply by 12, 16, 18 and 24 Worksheet

Maths tricks trick 19: Factor chains for multiplying · Set 643 · 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. 1.27 × 18 =
2. 2.12 × 24 =
3. 3.32 × 14 =
4. 4.28 × 15 =
5. 5.48 × 18 =
6. 6.34 × 16 =
7. 7.16 × 16 =
8. 8.23 × 15 =
9. 9.14 × 24 =
10. 10.29 × 12 =
11. 11.35 × 15 =
12. 12.27 × 14 =
13. 13.41 × 16 =
14. 14.21 × 18 =
15. 15.20 × 12 =
16. 16.38 × 18 =
17. 17.15 × 14 =
18. 18.37 × 15 =
19. 19.43 × 24 =
20. 20.13 × 18 =
21. 21.36 × 24 =
22. 22.31 × 15 =
23. 23.17 × 12 =
24. 24.38 × 15 =
25. 25.47 × 15 =
26. 26.40 × 14 =
27. 27.11 × 24 =
28. 28.40 × 15 =
29. 29.19 × 14 =
30. 30.29 × 24 =
31. 31.15 × 12 =
32. 32.25 × 24 =
33. 33.33 × 15 =
34. 34.43 × 18 =
35. 35.34 × 12 =
36. 36.17 × 15 =
37. 37.23 × 18 =
38. 38.38 × 12 =
39. 39.19 × 12 =
40. 40.40 × 18 =

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