Multiply by 12, 16, 18 and 24 Worksheet

Maths tricks trick 19: Factor chains for multiplying · Set 913 · 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. 1.43 × 15 =
2. 2.38 × 18 =
3. 3.23 × 24 =
4. 4.29 × 18 =
5. 5.33 × 14 =
6. 6.17 × 24 =
7. 7.49 × 14 =
8. 8.32 × 24 =
9. 9.39 × 24 =
10. 10.25 × 24 =
11. 11.11 × 18 =
12. 12.30 × 14 =
13. 13.47 × 24 =
14. 14.38 × 14 =
15. 15.44 × 12 =
16. 16.34 × 24 =
17. 17.27 × 16 =
18. 18.13 × 24 =
19. 19.26 × 12 =
20. 20.34 × 12 =
21. 21.20 × 12 =
22. 22.30 × 24 =
23. 23.19 × 18 =
24. 24.45 × 12 =
25. 25.46 × 12 =
26. 26.48 × 16 =
27. 27.43 × 14 =
28. 28.40 × 15 =
29. 29.48 × 24 =
30. 30.31 × 14 =
31. 31.33 × 12 =
32. 32.27 × 24 =
33. 33.24 × 14 =
34. 34.21 × 15 =
35. 35.14 × 12 =
36. 36.11 × 16 =
37. 37.38 × 12 =
38. 38.49 × 12 =
39. 39.38 × 24 =
40. 40.35 × 24 =

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