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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 289 · 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. 1.29 × 8 =
  2. 2.23 × 8 =
  3. 3.74 × 8 =
  4. 4.69 × 8 =
  5. 5.79 × 4 =
  6. 6.86 × 4 =
  7. 7.23 × 4 =
  8. 8.108 × 4 =
  9. 9.33 × 8 =
  10. 10.21 × 4 =
  11. 11.39 × 8 =
  12. 12.81 × 4 =
  13. 13.49 × 8 =
  14. 14.160 × 4 =
  15. 15.146 × 4 =
  16. 16.94 × 4 =
  17. 17.49 × 4 =
  18. 18.13 × 8 =
  19. 19.152 × 4 =
  20. 20.68 × 4 =
  21. 21.100 × 4 =
  22. 22.73 × 8 =
  23. 23.46 × 8 =
  24. 24.17 × 8 =
  25. 25.29 × 8 =
  26. 26.150 × 4 =
  27. 27.149 × 4 =
  28. 28.89 × 4 =
  29. 29.142 × 4 =
  30. 30.56 × 8 =
  31. 31.71 × 8 =
  32. 32.67 × 8 =
  33. 33.54 × 4 =
  34. 34.56 × 4 =
  35. 35.70 × 4 =
  36. 36.20 × 8 =
  37. 37.77 × 4 =
  38. 38.116 × 4 =
  39. 39.28 × 8 =
  40. 40.66 × 8 =

Answer key

  1. 232
  2. 184
  3. 592
  4. 552
  5. 316
  6. 344
  7. 92
  8. 432
  9. 264
  10. 84
  11. 312
  12. 324
  13. 392
  14. 640
  15. 584
  16. 376
  17. 196
  18. 104
  19. 608
  20. 272
  21. 400
  22. 584
  23. 368
  24. 136
  25. 232
  26. 600
  27. 596
  28. 356
  29. 568
  30. 448
  31. 568
  32. 536
  33. 216
  34. 224
  35. 280
  36. 160
  37. 308
  38. 464
  39. 224
  40. 528

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