Multiply by 12, 16, 18 and 24 Worksheet

Maths tricks trick 19: Factor chains for multiplying · Set 635 · 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 × 18 =
2. 2.17 × 12 =
3. 3.25 × 24 =
4. 4.16 × 24 =
5. 5.41 × 14 =
6. 6.23 × 16 =
7. 7.31 × 24 =
8. 8.30 × 12 =
9. 9.15 × 18 =
10. 10.18 × 16 =
11. 11.46 × 12 =
12. 12.44 × 15 =
13. 13.27 × 18 =
14. 14.36 × 16 =
15. 15.21 × 14 =
16. 16.21 × 16 =
17. 17.25 × 12 =
18. 18.48 × 16 =
19. 19.40 × 14 =
20. 20.36 × 14 =
21. 21.12 × 14 =
22. 22.47 × 12 =
23. 23.49 × 12 =
24. 24.34 × 15 =
25. 25.14 × 12 =
26. 26.28 × 24 =
27. 27.36 × 24 =
28. 28.16 × 16 =
29. 29.40 × 12 =
30. 30.33 × 16 =
31. 31.16 × 15 =
32. 32.39 × 24 =
33. 33.39 × 12 =
34. 34.25 × 14 =
35. 35.35 × 14 =
36. 36.43 × 14 =
37. 37.44 × 24 =
38. 38.48 × 14 =
39. 39.13 × 14 =
40. 40.46 × 14 =

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