Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 503 · 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. 1.140 × 4 =
2. 2.15 × 8 =
3. 3.61 × 8 =
4. 4.12 × 8 =
5. 5.53 × 8 =
6. 6.157 × 4 =
7. 7.33 × 8 =
8. 8.138 × 4 =
9. 9.72 × 4 =
10. 10.34 × 8 =
11. 11.70 × 8 =
12. 12.35 × 4 =
13. 13.12 × 8 =
14. 14.80 × 4 =
15. 15.142 × 4 =
16. 16.30 × 8 =
17. 17.24 × 8 =
18. 18.152 × 4 =
19. 19.16 × 8 =
20. 20.126 × 4 =
21. 21.16 × 8 =
22. 22.154 × 4 =
23. 23.85 × 4 =
24. 24.24 × 8 =
25. 25.51 × 4 =
26. 26.124 × 4 =
27. 27.52 × 4 =
28. 28.68 × 8 =
29. 29.50 × 8 =
30. 30.66 × 4 =
31. 31.40 × 4 =
32. 32.34 × 8 =
33. 33.37 × 8 =
34. 34.135 × 4 =
35. 35.40 × 4 =
36. 36.105 × 4 =
37. 37.44 × 4 =
38. 38.15 × 8 =
39. 39.76 × 4 =
40. 40.99 × 4 =

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