Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 455 · 40 questions

The fast method (Double up): × 4: double, then double again. × 8: double three times. To double a big number, double the tens and the ones separately and add: double 37 = 60 + 14 = 74.

1. 1.115 × 4 =
2. 2.35 × 8 =
3. 3.154 × 4 =
4. 4.145 × 4 =
5. 5.53 × 8 =
6. 6.117 × 4 =
7. 7.44 × 4 =
8. 8.66 × 4 =
9. 9.105 × 4 =
10. 10.65 × 8 =
11. 11.23 × 4 =
12. 12.31 × 8 =
13. 13.72 × 4 =
14. 14.77 × 4 =
15. 15.26 × 8 =
16. 16.62 × 8 =
17. 17.113 × 4 =
18. 18.66 × 4 =
19. 19.145 × 4 =
20. 20.61 × 4 =
21. 21.14 × 4 =
22. 22.85 × 4 =
23. 23.41 × 8 =
24. 24.133 × 4 =
25. 25.38 × 8 =
26. 26.111 × 4 =
27. 27.47 × 8 =
28. 28.120 × 4 =
29. 29.43 × 8 =
30. 30.68 × 4 =
31. 31.25 × 4 =
32. 32.31 × 4 =
33. 33.73 × 8 =
34. 34.78 × 4 =
35. 35.153 × 4 =
36. 36.80 × 4 =
37. 37.39 × 8 =
38. 38.37 × 8 =
39. 39.81 × 4 =
40. 40.36 × 4 =

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