Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 806 · 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. 1.30 × 8 =
2. 2.106 × 4 =
3. 3.63 × 4 =
4. 4.24 × 8 =
5. 5.27 × 8 =
6. 6.95 × 4 =
7. 7.66 × 4 =
8. 8.47 × 8 =
9. 9.65 × 8 =
10. 10.74 × 4 =
11. 11.96 × 4 =
12. 12.47 × 8 =
13. 13.34 × 4 =
14. 14.100 × 4 =
15. 15.23 × 4 =
16. 16.24 × 4 =
17. 17.98 × 4 =
18. 18.73 × 8 =
19. 19.152 × 4 =
20. 20.37 × 8 =
21. 21.149 × 4 =
22. 22.16 × 8 =
23. 23.90 × 4 =
24. 24.82 × 4 =
25. 25.83 × 4 =
26. 26.45 × 8 =
27. 27.50 × 4 =
28. 28.85 × 4 =
29. 29.32 × 8 =
30. 30.28 × 4 =
31. 31.48 × 8 =
32. 32.59 × 8 =
33. 33.70 × 8 =
34. 34.20 × 8 =
35. 35.13 × 4 =
36. 36.47 × 8 =
37. 37.58 × 4 =
38. 38.58 × 8 =
39. 39.55 × 8 =
40. 40.71 × 8 =

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