Multiply by 12, 16, 18 and 24 Worksheet

Maths tricks trick 19: Factor chains for multiplying · Set 81 · 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 × 15 =
2. 2.38 × 15 =
3. 3.28 × 16 =
4. 4.34 × 24 =
5. 5.13 × 15 =
6. 6.18 × 16 =
7. 7.38 × 24 =
8. 8.11 × 18 =
9. 9.11 × 12 =
10. 10.22 × 12 =
11. 11.36 × 12 =
12. 12.33 × 24 =
13. 13.38 × 12 =
14. 14.45 × 18 =
15. 15.29 × 18 =
16. 16.22 × 15 =
17. 17.34 × 16 =
18. 18.33 × 18 =
19. 19.18 × 18 =
20. 20.31 × 16 =
21. 21.24 × 12 =
22. 22.24 × 14 =
23. 23.44 × 15 =
24. 24.40 × 18 =
25. 25.30 × 18 =
26. 26.33 × 15 =
27. 27.38 × 18 =
28. 28.15 × 15 =
29. 29.23 × 15 =
30. 30.29 × 16 =
31. 31.37 × 14 =
32. 32.18 × 12 =
33. 33.42 × 18 =
34. 34.46 × 14 =
35. 35.15 × 12 =
36. 36.32 × 24 =
37. 37.16 × 14 =
38. 38.26 × 12 =
39. 39.41 × 16 =
40. 40.13 × 14 =

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