Multiply by 12, 16, 18 and 24 Worksheet

Maths tricks trick 19: Factor chains for multiplying · Set 198 · 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. 1.40 × 12 =
2. 2.28 × 12 =
3. 3.17 × 16 =
4. 4.20 × 18 =
5. 5.45 × 14 =
6. 6.19 × 15 =
7. 7.44 × 24 =
8. 8.11 × 12 =
9. 9.33 × 18 =
10. 10.11 × 24 =
11. 11.15 × 18 =
12. 12.24 × 18 =
13. 13.45 × 18 =
14. 14.26 × 24 =
15. 15.44 × 14 =
16. 16.43 × 18 =
17. 17.28 × 14 =
18. 18.23 × 18 =
19. 19.32 × 16 =
20. 20.25 × 18 =
21. 21.36 × 18 =
22. 22.25 × 12 =
23. 23.47 × 24 =
24. 24.19 × 18 =
25. 25.15 × 14 =
26. 26.45 × 15 =
27. 27.46 × 16 =
28. 28.36 × 15 =
29. 29.47 × 18 =
30. 30.42 × 24 =
31. 31.46 × 24 =
32. 32.26 × 16 =
33. 33.29 × 18 =
34. 34.20 × 15 =
35. 35.48 × 14 =
36. 36.36 × 12 =
37. 37.41 × 14 =
38. 38.38 × 18 =
39. 39.31 × 24 =
40. 40.30 × 24 =

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