Multiply by 12, 16, 18 and 24 Worksheet

Maths tricks trick 19: Factor chains for multiplying · Set 727 · 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. 1.29 × 12 =
2. 2.48 × 12 =
3. 3.13 × 15 =
4. 4.28 × 12 =
5. 5.14 × 12 =
6. 6.43 × 15 =
7. 7.19 × 24 =
8. 8.45 × 15 =
9. 9.40 × 24 =
10. 10.20 × 15 =
11. 11.15 × 15 =
12. 12.42 × 14 =
13. 13.21 × 16 =
14. 14.41 × 12 =
15. 15.16 × 16 =
16. 16.15 × 24 =
17. 17.34 × 24 =
18. 18.23 × 24 =
19. 19.32 × 14 =
20. 20.22 × 12 =
21. 21.49 × 24 =
22. 22.45 × 18 =
23. 23.18 × 16 =
24. 24.38 × 12 =
25. 25.17 × 14 =
26. 26.30 × 12 =
27. 27.38 × 16 =
28. 28.38 × 24 =
29. 29.17 × 24 =
30. 30.44 × 16 =
31. 31.39 × 18 =
32. 32.24 × 16 =
33. 33.27 × 18 =
34. 34.34 × 15 =
35. 35.36 × 12 =
36. 36.26 × 12 =
37. 37.39 × 16 =
38. 38.43 × 24 =
39. 39.28 × 16 =
40. 40.37 × 16 =

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