Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 118 · 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. 1.62 × 4 =
2. 2.75 × 8 =
3. 3.44 × 8 =
4. 4.38 × 4 =
5. 5.28 × 8 =
6. 6.38 × 8 =
7. 7.43 × 8 =
8. 8.53 × 4 =
9. 9.38 × 8 =
10. 10.91 × 4 =
11. 11.106 × 4 =
12. 12.21 × 8 =
13. 13.29 × 8 =
14. 14.93 × 4 =
15. 15.44 × 8 =
16. 16.145 × 4 =
17. 17.136 × 4 =
18. 18.30 × 8 =
19. 19.139 × 4 =
20. 20.77 × 4 =
21. 21.55 × 8 =
22. 22.57 × 4 =
23. 23.147 × 4 =
24. 24.66 × 8 =
25. 25.23 × 4 =
26. 26.62 × 4 =
27. 27.44 × 4 =
28. 28.38 × 8 =
29. 29.71 × 8 =
30. 30.15 × 8 =
31. 31.154 × 4 =
32. 32.155 × 4 =
33. 33.47 × 4 =
34. 34.64 × 4 =
35. 35.59 × 8 =
36. 36.60 × 4 =
37. 37.73 × 8 =
38. 38.55 × 4 =
39. 39.45 × 8 =
40. 40.47 × 4 =

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