Multiply by 12, 16, 18 and 24 Worksheet

Maths tricks trick 19: Factor chains for multiplying · Set 183 · 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. 1.36 × 15 =
2. 2.45 × 12 =
3. 3.21 × 18 =
4. 4.23 × 14 =
5. 5.30 × 12 =
6. 6.40 × 18 =
7. 7.11 × 15 =
8. 8.22 × 16 =
9. 9.22 × 18 =
10. 10.40 × 12 =
11. 11.48 × 15 =
12. 12.12 × 12 =
13. 13.17 × 18 =
14. 14.19 × 14 =
15. 15.42 × 14 =
16. 16.41 × 24 =
17. 17.39 × 24 =
18. 18.33 × 15 =
19. 19.39 × 14 =
20. 20.43 × 12 =
21. 21.28 × 14 =
22. 22.25 × 24 =
23. 23.21 × 15 =
24. 24.49 × 14 =
25. 25.32 × 12 =
26. 26.34 × 18 =
27. 27.44 × 18 =
28. 28.12 × 18 =
29. 29.22 × 12 =
30. 30.38 × 14 =
31. 31.35 × 18 =
32. 32.17 × 12 =
33. 33.43 × 16 =
34. 34.24 × 12 =
35. 35.16 × 14 =
36. 36.21 × 24 =
37. 37.44 × 24 =
38. 38.31 × 15 =
39. 39.12 × 16 =
40. 40.29 × 14 =

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