Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 885 · 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. 1.54 × 8 =
2. 2.63 × 4 =
3. 3.54 × 4 =
4. 4.23 × 8 =
5. 5.22 × 8 =
6. 6.153 × 4 =
7. 7.45 × 4 =
8. 8.21 × 8 =
9. 9.153 × 4 =
10. 10.102 × 4 =
11. 11.17 × 8 =
12. 12.144 × 4 =
13. 13.15 × 4 =
14. 14.44 × 4 =
15. 15.34 × 8 =
16. 16.18 × 4 =
17. 17.30 × 8 =
18. 18.15 × 8 =
19. 19.25 × 8 =
20. 20.57 × 4 =
21. 21.51 × 8 =
22. 22.31 × 4 =
23. 23.28 × 4 =
24. 24.44 × 8 =
25. 25.73 × 8 =
26. 26.19 × 4 =
27. 27.37 × 8 =
28. 28.20 × 8 =
29. 29.47 × 8 =
30. 30.156 × 4 =
31. 31.111 × 4 =
32. 32.58 × 8 =
33. 33.74 × 8 =
34. 34.17 × 8 =
35. 35.64 × 8 =
36. 36.56 × 8 =
37. 37.63 × 8 =
38. 38.57 × 8 =
39. 39.57 × 8 =
40. 40.59 × 8 =

Free speed calculation lessons, practice and worksheets at talentjr.in/speed-maths