Multiply by 12, 16, 18 and 24 Worksheet

Maths tricks trick 19: Factor chains for multiplying · Set 365 · 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. 1.13 × 12 =
2. 2.33 × 15 =
3. 3.49 × 15 =
4. 4.39 × 15 =
5. 5.17 × 12 =
6. 6.26 × 18 =
7. 7.19 × 18 =
8. 8.47 × 12 =
9. 9.46 × 15 =
10. 10.47 × 15 =
11. 11.28 × 18 =
12. 12.22 × 12 =
13. 13.19 × 15 =
14. 14.40 × 16 =
15. 15.20 × 12 =
16. 16.28 × 24 =
17. 17.49 × 24 =
18. 18.37 × 18 =
19. 19.13 × 16 =
20. 20.12 × 14 =
21. 21.33 × 16 =
22. 22.34 × 12 =
23. 23.37 × 14 =
24. 24.16 × 16 =
25. 25.18 × 16 =
26. 26.43 × 18 =
27. 27.29 × 14 =
28. 28.46 × 18 =
29. 29.49 × 12 =
30. 30.17 × 15 =
31. 31.36 × 18 =
32. 32.19 × 12 =
33. 33.39 × 18 =
34. 34.11 × 14 =
35. 35.31 × 14 =
36. 36.13 × 14 =
37. 37.45 × 16 =
38. 38.36 × 16 =
39. 39.34 × 16 =
40. 40.29 × 12 =

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