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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 637 · 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. 1.120 × 4 =
  2. 2.150 × 4 =
  3. 3.132 × 4 =
  4. 4.73 × 8 =
  5. 5.101 × 4 =
  6. 6.136 × 4 =
  7. 7.59 × 8 =
  8. 8.64 × 8 =
  9. 9.32 × 8 =
  10. 10.41 × 8 =
  11. 11.34 × 8 =
  12. 12.132 × 4 =
  13. 13.52 × 8 =
  14. 14.66 × 8 =
  15. 15.39 × 8 =
  16. 16.97 × 4 =
  17. 17.28 × 4 =
  18. 18.78 × 4 =
  19. 19.40 × 8 =
  20. 20.12 × 8 =
  21. 21.75 × 8 =
  22. 22.30 × 4 =
  23. 23.13 × 8 =
  24. 24.27 × 4 =
  25. 25.84 × 4 =
  26. 26.15 × 8 =
  27. 27.46 × 8 =
  28. 28.39 × 4 =
  29. 29.52 × 8 =
  30. 30.37 × 4 =
  31. 31.99 × 4 =
  32. 32.86 × 4 =
  33. 33.141 × 4 =
  34. 34.34 × 8 =
  35. 35.92 × 4 =
  36. 36.128 × 4 =
  37. 37.38 × 4 =
  38. 38.73 × 8 =
  39. 39.92 × 4 =
  40. 40.16 × 4 =

Answer key

  1. 480
  2. 600
  3. 528
  4. 584
  5. 404
  6. 544
  7. 472
  8. 512
  9. 256
  10. 328
  11. 272
  12. 528
  13. 416
  14. 528
  15. 312
  16. 388
  17. 112
  18. 312
  19. 320
  20. 96
  21. 600
  22. 120
  23. 104
  24. 108
  25. 336
  26. 120
  27. 368
  28. 156
  29. 416
  30. 148
  31. 396
  32. 344
  33. 564
  34. 272
  35. 368
  36. 512
  37. 152
  38. 584
  39. 368
  40. 64

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