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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 6 · 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. 1.17 × 4 =
  2. 2.44 × 4 =
  3. 3.27 × 4 =
  4. 4.18 × 4 =
  5. 5.72 × 8 =
  6. 6.16 × 8 =
  7. 7.74 × 8 =
  8. 8.51 × 8 =
  9. 9.25 × 4 =
  10. 10.42 × 8 =
  11. 11.88 × 4 =
  12. 12.20 × 4 =
  13. 13.56 × 8 =
  14. 14.36 × 8 =
  15. 15.21 × 4 =
  16. 16.38 × 4 =
  17. 17.87 × 4 =
  18. 18.26 × 8 =
  19. 19.129 × 4 =
  20. 20.67 × 4 =
  21. 21.109 × 4 =
  22. 22.91 × 4 =
  23. 23.40 × 8 =
  24. 24.70 × 8 =
  25. 25.146 × 4 =
  26. 26.140 × 4 =
  27. 27.21 × 8 =
  28. 28.46 × 8 =
  29. 29.86 × 4 =
  30. 30.85 × 4 =
  31. 31.89 × 4 =
  32. 32.119 × 4 =
  33. 33.15 × 4 =
  34. 34.79 × 4 =
  35. 35.72 × 4 =
  36. 36.15 × 4 =
  37. 37.140 × 4 =
  38. 38.73 × 4 =
  39. 39.13 × 8 =
  40. 40.133 × 4 =

Answer key

  1. 68
  2. 176
  3. 108
  4. 72
  5. 576
  6. 128
  7. 592
  8. 408
  9. 100
  10. 336
  11. 352
  12. 80
  13. 448
  14. 288
  15. 84
  16. 152
  17. 348
  18. 208
  19. 516
  20. 268
  21. 436
  22. 364
  23. 320
  24. 560
  25. 584
  26. 560
  27. 168
  28. 368
  29. 344
  30. 340
  31. 356
  32. 476
  33. 60
  34. 316
  35. 288
  36. 60
  37. 560
  38. 292
  39. 104
  40. 532

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