Multiply by 12, 16, 18 and 24 Worksheet

Maths tricks trick 19: Factor chains for multiplying · Set 269 · 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. 1.33 × 12 =
2. 2.15 × 15 =
3. 3.43 × 16 =
4. 4.20 × 18 =
5. 5.29 × 12 =
6. 6.48 × 12 =
7. 7.18 × 16 =
8. 8.31 × 12 =
9. 9.32 × 15 =
10. 10.12 × 14 =
11. 11.40 × 24 =
12. 12.24 × 15 =
13. 13.26 × 15 =
14. 14.42 × 16 =
15. 15.14 × 24 =
16. 16.43 × 14 =
17. 17.42 × 12 =
18. 18.17 × 12 =
19. 19.45 × 15 =
20. 20.40 × 14 =
21. 21.12 × 18 =
22. 22.44 × 16 =
23. 23.46 × 16 =
24. 24.46 × 14 =
25. 25.39 × 24 =
26. 26.35 × 16 =
27. 27.37 × 12 =
28. 28.49 × 14 =
29. 29.42 × 18 =
30. 30.43 × 12 =
31. 31.16 × 14 =
32. 32.40 × 15 =
33. 33.47 × 14 =
34. 34.36 × 14 =
35. 35.21 × 15 =
36. 36.37 × 14 =
37. 37.49 × 18 =
38. 38.28 × 14 =
39. 39.19 × 18 =
40. 40.30 × 18 =

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