Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 620 · 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. 1.67 × 4 =
2. 2.16 × 4 =
3. 3.25 × 4 =
4. 4.22 × 8 =
5. 5.62 × 8 =
6. 6.70 × 4 =
7. 7.55 × 4 =
8. 8.42 × 8 =
9. 9.95 × 4 =
10. 10.20 × 8 =
11. 11.125 × 4 =
12. 12.43 × 4 =
13. 13.45 × 8 =
14. 14.68 × 8 =
15. 15.102 × 4 =
16. 16.160 × 4 =
17. 17.52 × 4 =
18. 18.72 × 8 =
19. 19.44 × 4 =
20. 20.24 × 8 =
21. 21.71 × 8 =
22. 22.22 × 4 =
23. 23.55 × 8 =
24. 24.27 × 8 =
25. 25.86 × 4 =
26. 26.43 × 8 =
27. 27.100 × 4 =
28. 28.45 × 4 =
29. 29.49 × 8 =
30. 30.108 × 4 =
31. 31.24 × 4 =
32. 32.31 × 4 =
33. 33.65 × 8 =
34. 34.82 × 4 =
35. 35.121 × 4 =
36. 36.53 × 4 =
37. 37.34 × 4 =
38. 38.65 × 4 =
39. 39.21 × 8 =
40. 40.63 × 8 =

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