Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 300 · 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. 1.79 × 4 =
2. 2.70 × 4 =
3. 3.104 × 4 =
4. 4.44 × 8 =
5. 5.18 × 4 =
6. 6.43 × 8 =
7. 7.68 × 4 =
8. 8.114 × 4 =
9. 9.118 × 4 =
10. 10.26 × 4 =
11. 11.51 × 8 =
12. 12.68 × 4 =
13. 13.44 × 4 =
14. 14.60 × 8 =
15. 15.16 × 4 =
16. 16.134 × 4 =
17. 17.37 × 8 =
18. 18.37 × 4 =
19. 19.21 × 8 =
20. 20.56 × 8 =
21. 21.68 × 8 =
22. 22.13 × 8 =
23. 23.50 × 8 =
24. 24.48 × 8 =
25. 25.39 × 4 =
26. 26.71 × 8 =
27. 27.95 × 4 =
28. 28.46 × 8 =
29. 29.136 × 4 =
30. 30.54 × 4 =
31. 31.30 × 4 =
32. 32.160 × 4 =
33. 33.36 × 8 =
34. 34.65 × 4 =
35. 35.24 × 4 =
36. 36.59 × 8 =
37. 37.74 × 8 =
38. 38.102 × 4 =
39. 39.58 × 8 =
40. 40.58 × 4 =

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