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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 262 · 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. 1.67 × 8 =
  2. 2.19 × 4 =
  3. 3.35 × 4 =
  4. 4.117 × 4 =
  5. 5.42 × 8 =
  6. 6.150 × 4 =
  7. 7.149 × 4 =
  8. 8.51 × 4 =
  9. 9.24 × 4 =
  10. 10.60 × 8 =
  11. 11.140 × 4 =
  12. 12.103 × 4 =
  13. 13.71 × 8 =
  14. 14.73 × 8 =
  15. 15.65 × 8 =
  16. 16.134 × 4 =
  17. 17.19 × 8 =
  18. 18.147 × 4 =
  19. 19.82 × 4 =
  20. 20.27 × 4 =
  21. 21.81 × 4 =
  22. 22.138 × 4 =
  23. 23.116 × 4 =
  24. 24.85 × 4 =
  25. 25.12 × 8 =
  26. 26.64 × 8 =
  27. 27.43 × 8 =
  28. 28.45 × 8 =
  29. 29.52 × 4 =
  30. 30.13 × 8 =
  31. 31.41 × 8 =
  32. 32.123 × 4 =
  33. 33.135 × 4 =
  34. 34.74 × 8 =
  35. 35.19 × 4 =
  36. 36.71 × 4 =
  37. 37.31 × 4 =
  38. 38.109 × 4 =
  39. 39.89 × 4 =
  40. 40.20 × 8 =

Answer key

  1. 536
  2. 76
  3. 140
  4. 468
  5. 336
  6. 600
  7. 596
  8. 204
  9. 96
  10. 480
  11. 560
  12. 412
  13. 568
  14. 584
  15. 520
  16. 536
  17. 152
  18. 588
  19. 328
  20. 108
  21. 324
  22. 552
  23. 464
  24. 340
  25. 96
  26. 512
  27. 344
  28. 360
  29. 208
  30. 104
  31. 328
  32. 492
  33. 540
  34. 592
  35. 76
  36. 284
  37. 124
  38. 436
  39. 356
  40. 160

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