Multiply by 12, 16, 18 and 24 Worksheet

Maths tricks trick 19: Factor chains for multiplying · Set 414 · 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. 1.38 × 18 =
2. 2.28 × 14 =
3. 3.48 × 14 =
4. 4.15 × 18 =
5. 5.24 × 24 =
6. 6.20 × 14 =
7. 7.14 × 24 =
8. 8.35 × 18 =
9. 9.37 × 14 =
10. 10.38 × 24 =
11. 11.20 × 15 =
12. 12.39 × 12 =
13. 13.47 × 14 =
14. 14.11 × 15 =
15. 15.23 × 16 =
16. 16.15 × 24 =
17. 17.40 × 16 =
18. 18.27 × 24 =
19. 19.46 × 16 =
20. 20.31 × 24 =
21. 21.14 × 18 =
22. 22.40 × 14 =
23. 23.31 × 16 =
24. 24.29 × 15 =
25. 25.23 × 14 =
26. 26.32 × 24 =
27. 27.36 × 16 =
28. 28.28 × 16 =
29. 29.16 × 14 =
30. 30.34 × 18 =
31. 31.42 × 12 =
32. 32.12 × 12 =
33. 33.11 × 14 =
34. 34.12 × 15 =
35. 35.45 × 14 =
36. 36.37 × 12 =
37. 37.16 × 16 =
38. 38.45 × 16 =
39. 39.15 × 15 =
40. 40.43 × 15 =

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