Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 347 · 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. 1.36 × 8 =
2. 2.22 × 4 =
3. 3.41 × 8 =
4. 4.34 × 8 =
5. 5.105 × 4 =
6. 6.58 × 4 =
7. 7.31 × 8 =
8. 8.71 × 8 =
9. 9.18 × 8 =
10. 10.67 × 8 =
11. 11.160 × 4 =
12. 12.127 × 4 =
13. 13.17 × 8 =
14. 14.47 × 8 =
15. 15.59 × 8 =
16. 16.44 × 8 =
17. 17.147 × 4 =
18. 18.108 × 4 =
19. 19.32 × 4 =
20. 20.154 × 4 =
21. 21.49 × 8 =
22. 22.35 × 4 =
23. 23.96 × 4 =
24. 24.29 × 8 =
25. 25.35 × 8 =
26. 26.91 × 4 =
27. 27.37 × 8 =
28. 28.35 × 4 =
29. 29.26 × 8 =
30. 30.58 × 8 =
31. 31.13 × 8 =
32. 32.37 × 4 =
33. 33.61 × 8 =
34. 34.60 × 4 =
35. 35.48 × 8 =
36. 36.117 × 4 =
37. 37.72 × 8 =
38. 38.74 × 8 =
39. 39.71 × 4 =
40. 40.92 × 4 =

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