Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 623 · 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. 1.18 × 8 =
2. 2.98 × 4 =
3. 3.36 × 4 =
4. 4.21 × 8 =
5. 5.34 × 8 =
6. 6.120 × 4 =
7. 7.100 × 4 =
8. 8.67 × 8 =
9. 9.156 × 4 =
10. 10.26 × 4 =
11. 11.66 × 8 =
12. 12.73 × 8 =
13. 13.77 × 4 =
14. 14.69 × 4 =
15. 15.14 × 8 =
16. 16.59 × 8 =
17. 17.78 × 4 =
18. 18.131 × 4 =
19. 19.54 × 8 =
20. 20.21 × 4 =
21. 21.26 × 8 =
22. 22.90 × 4 =
23. 23.52 × 4 =
24. 24.12 × 8 =
25. 25.90 × 4 =
26. 26.53 × 8 =
27. 27.66 × 8 =
28. 28.41 × 8 =
29. 29.50 × 8 =
30. 30.129 × 4 =
31. 31.15 × 4 =
32. 32.35 × 4 =
33. 33.127 × 4 =
34. 34.91 × 4 =
35. 35.19 × 8 =
36. 36.134 × 4 =
37. 37.32 × 4 =
38. 38.20 × 8 =
39. 39.110 × 4 =
40. 40.52 × 4 =

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