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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 560 · 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. 1.72 × 8 =
  2. 2.43 × 8 =
  3. 3.74 × 8 =
  4. 4.115 × 4 =
  5. 5.46 × 8 =
  6. 6.115 × 4 =
  7. 7.47 × 4 =
  8. 8.78 × 4 =
  9. 9.121 × 4 =
  10. 10.17 × 8 =
  11. 11.122 × 4 =
  12. 12.68 × 4 =
  13. 13.105 × 4 =
  14. 14.158 × 4 =
  15. 15.72 × 8 =
  16. 16.131 × 4 =
  17. 17.88 × 4 =
  18. 18.131 × 4 =
  19. 19.39 × 4 =
  20. 20.78 × 4 =
  21. 21.96 × 4 =
  22. 22.97 × 4 =
  23. 23.23 × 4 =
  24. 24.151 × 4 =
  25. 25.49 × 8 =
  26. 26.97 × 4 =
  27. 27.45 × 8 =
  28. 28.35 × 8 =
  29. 29.129 × 4 =
  30. 30.84 × 4 =
  31. 31.132 × 4 =
  32. 32.27 × 8 =
  33. 33.38 × 4 =
  34. 34.62 × 4 =
  35. 35.14 × 8 =
  36. 36.12 × 8 =
  37. 37.63 × 8 =
  38. 38.69 × 4 =
  39. 39.20 × 4 =
  40. 40.71 × 8 =

Answer key

  1. 576
  2. 344
  3. 592
  4. 460
  5. 368
  6. 460
  7. 188
  8. 312
  9. 484
  10. 136
  11. 488
  12. 272
  13. 420
  14. 632
  15. 576
  16. 524
  17. 352
  18. 524
  19. 156
  20. 312
  21. 384
  22. 388
  23. 92
  24. 604
  25. 392
  26. 388
  27. 360
  28. 280
  29. 516
  30. 336
  31. 528
  32. 216
  33. 152
  34. 248
  35. 112
  36. 96
  37. 504
  38. 276
  39. 80
  40. 568

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