Multiply by 12, 16, 18 and 24 Worksheet

Maths tricks trick 19: Factor chains for multiplying · Set 910 · 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. 1.21 × 18 =
2. 2.11 × 24 =
3. 3.42 × 14 =
4. 4.38 × 16 =
5. 5.39 × 14 =
6. 6.24 × 15 =
7. 7.45 × 15 =
8. 8.13 × 15 =
9. 9.27 × 18 =
10. 10.31 × 14 =
11. 11.44 × 14 =
12. 12.22 × 12 =
13. 13.21 × 14 =
14. 14.16 × 16 =
15. 15.46 × 16 =
16. 16.17 × 12 =
17. 17.49 × 12 =
18. 18.40 × 18 =
19. 19.22 × 18 =
20. 20.40 × 24 =
21. 21.49 × 18 =
22. 22.26 × 14 =
23. 23.29 × 14 =
24. 24.24 × 12 =
25. 25.33 × 12 =
26. 26.19 × 15 =
27. 27.34 × 12 =
28. 28.46 × 18 =
29. 29.11 × 15 =
30. 30.33 × 16 =
31. 31.19 × 12 =
32. 32.34 × 15 =
33. 33.15 × 24 =
34. 34.45 × 14 =
35. 35.27 × 12 =
36. 36.44 × 12 =
37. 37.20 × 15 =
38. 38.14 × 15 =
39. 39.48 × 14 =
40. 40.39 × 18 =

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