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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 759 · 40 questions
TalentJR

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.

NameDateTime takenScore ___ / 40
  1. 1.39 × 8 =
  2. 2.30 × 8 =
  3. 3.149 × 4 =
  4. 4.64 × 4 =
  5. 5.27 × 4 =
  6. 6.95 × 4 =
  7. 7.32 × 4 =
  8. 8.22 × 8 =
  9. 9.155 × 4 =
  10. 10.18 × 4 =
  11. 11.41 × 4 =
  12. 12.73 × 8 =
  13. 13.28 × 4 =
  14. 14.64 × 8 =
  15. 15.70 × 8 =
  16. 16.48 × 4 =
  17. 17.41 × 8 =
  18. 18.17 × 4 =
  19. 19.89 × 4 =
  20. 20.26 × 4 =
  21. 21.49 × 8 =
  22. 22.23 × 4 =
  23. 23.113 × 4 =
  24. 24.17 × 4 =
  25. 25.73 × 8 =
  26. 26.51 × 8 =
  27. 27.158 × 4 =
  28. 28.35 × 4 =
  29. 29.98 × 4 =
  30. 30.60 × 4 =
  31. 31.22 × 8 =
  32. 32.19 × 8 =
  33. 33.50 × 8 =
  34. 34.20 × 4 =
  35. 35.60 × 8 =
  36. 36.70 × 8 =
  37. 37.24 × 8 =
  38. 38.41 × 8 =
  39. 39.13 × 8 =
  40. 40.12 × 8 =

Answer key

  1. 312
  2. 240
  3. 596
  4. 256
  5. 108
  6. 380
  7. 128
  8. 176
  9. 620
  10. 72
  11. 164
  12. 584
  13. 112
  14. 512
  15. 560
  16. 192
  17. 328
  18. 68
  19. 356
  20. 104
  21. 392
  22. 92
  23. 452
  24. 68
  25. 584
  26. 408
  27. 632
  28. 140
  29. 392
  30. 240
  31. 176
  32. 152
  33. 400
  34. 80
  35. 480
  36. 560
  37. 192
  38. 328
  39. 104
  40. 96

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