Multiply by 12, 16, 18 and 24 Worksheet

Maths tricks trick 19: Factor chains for multiplying · Set 266 · 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. 1.26 × 14 =
2. 2.33 × 16 =
3. 3.35 × 24 =
4. 4.48 × 24 =
5. 5.39 × 14 =
6. 6.40 × 14 =
7. 7.14 × 14 =
8. 8.48 × 16 =
9. 9.27 × 18 =
10. 10.38 × 24 =
11. 11.23 × 12 =
12. 12.47 × 16 =
13. 13.13 × 18 =
14. 14.20 × 24 =
15. 15.35 × 16 =
16. 16.32 × 24 =
17. 17.34 × 18 =
18. 18.38 × 12 =
19. 19.11 × 16 =
20. 20.31 × 16 =
21. 21.49 × 18 =
22. 22.31 × 12 =
23. 23.11 × 12 =
24. 24.42 × 18 =
25. 25.41 × 14 =
26. 26.30 × 16 =
27. 27.26 × 12 =
28. 28.15 × 15 =
29. 29.43 × 14 =
30. 30.23 × 16 =
31. 31.22 × 16 =
32. 32.44 × 24 =
33. 33.16 × 24 =
34. 34.21 × 16 =
35. 35.17 × 16 =
36. 36.41 × 16 =
37. 37.13 × 24 =
38. 38.22 × 24 =
39. 39.33 × 24 =
40. 40.26 × 16 =

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