Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 562 · 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. 1.71 × 8 =
2. 2.154 × 4 =
3. 3.64 × 8 =
4. 4.66 × 8 =
5. 5.18 × 8 =
6. 6.148 × 4 =
7. 7.73 × 8 =
8. 8.133 × 4 =
9. 9.21 × 8 =
10. 10.58 × 8 =
11. 11.127 × 4 =
12. 12.27 × 4 =
13. 13.138 × 4 =
14. 14.19 × 8 =
15. 15.54 × 4 =
16. 16.87 × 4 =
17. 17.50 × 8 =
18. 18.118 × 4 =
19. 19.43 × 8 =
20. 20.36 × 4 =
21. 21.45 × 4 =
22. 22.70 × 4 =
23. 23.71 × 4 =
24. 24.74 × 8 =
25. 25.36 × 8 =
26. 26.66 × 8 =
27. 27.40 × 8 =
28. 28.61 × 4 =
29. 29.33 × 8 =
30. 30.109 × 4 =
31. 31.54 × 8 =
32. 32.41 × 4 =
33. 33.53 × 8 =
34. 34.58 × 8 =
35. 35.14 × 4 =
36. 36.53 × 8 =
37. 37.49 × 4 =
38. 38.130 × 4 =
39. 39.27 × 4 =
40. 40.83 × 4 =

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