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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 12 · 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. 1.63 × 8 =
  2. 2.70 × 8 =
  3. 3.121 × 4 =
  4. 4.22 × 8 =
  5. 5.54 × 4 =
  6. 6.115 × 4 =
  7. 7.14 × 8 =
  8. 8.56 × 8 =
  9. 9.15 × 8 =
  10. 10.25 × 8 =
  11. 11.148 × 4 =
  12. 12.148 × 4 =
  13. 13.67 × 8 =
  14. 14.125 × 4 =
  15. 15.106 × 4 =
  16. 16.39 × 4 =
  17. 17.67 × 8 =
  18. 18.47 × 8 =
  19. 19.19 × 4 =
  20. 20.32 × 8 =
  21. 21.44 × 8 =
  22. 22.60 × 8 =
  23. 23.39 × 8 =
  24. 24.109 × 4 =
  25. 25.78 × 4 =
  26. 26.52 × 4 =
  27. 27.53 × 4 =
  28. 28.33 × 8 =
  29. 29.12 × 8 =
  30. 30.20 × 4 =
  31. 31.58 × 8 =
  32. 32.157 × 4 =
  33. 33.66 × 4 =
  34. 34.68 × 4 =
  35. 35.15 × 8 =
  36. 36.69 × 8 =
  37. 37.136 × 4 =
  38. 38.21 × 4 =
  39. 39.38 × 4 =
  40. 40.39 × 8 =

Answer key

  1. 504
  2. 560
  3. 484
  4. 176
  5. 216
  6. 460
  7. 112
  8. 448
  9. 120
  10. 200
  11. 592
  12. 592
  13. 536
  14. 500
  15. 424
  16. 156
  17. 536
  18. 376
  19. 76
  20. 256
  21. 352
  22. 480
  23. 312
  24. 436
  25. 312
  26. 208
  27. 212
  28. 264
  29. 96
  30. 80
  31. 464
  32. 628
  33. 264
  34. 272
  35. 120
  36. 552
  37. 544
  38. 84
  39. 152
  40. 312

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