Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 767 · 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. 1.75 × 8 =
2. 2.91 × 4 =
3. 3.16 × 8 =
4. 4.102 × 4 =
5. 5.74 × 4 =
6. 6.146 × 4 =
7. 7.50 × 8 =
8. 8.38 × 8 =
9. 9.88 × 4 =
10. 10.55 × 8 =
11. 11.19 × 8 =
12. 12.110 × 4 =
13. 13.21 × 8 =
14. 14.70 × 8 =
15. 15.160 × 4 =
16. 16.44 × 8 =
17. 17.97 × 4 =
18. 18.42 × 4 =
19. 19.84 × 4 =
20. 20.99 × 4 =
21. 21.17 × 8 =
22. 22.118 × 4 =
23. 23.20 × 4 =
24. 24.60 × 8 =
25. 25.101 × 4 =
26. 26.46 × 4 =
27. 27.71 × 8 =
28. 28.47 × 4 =
29. 29.76 × 4 =
30. 30.122 × 4 =
31. 31.31 × 4 =
32. 32.52 × 8 =
33. 33.64 × 8 =
34. 34.63 × 8 =
35. 35.65 × 8 =
36. 36.34 × 8 =
37. 37.47 × 8 =
38. 38.72 × 8 =
39. 39.73 × 8 =
40. 40.15 × 4 =

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