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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 317 · 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. 1.54 × 8 =
  2. 2.51 × 8 =
  3. 3.24 × 8 =
  4. 4.147 × 4 =
  5. 5.92 × 4 =
  6. 6.52 × 4 =
  7. 7.66 × 8 =
  8. 8.114 × 4 =
  9. 9.49 × 8 =
  10. 10.15 × 8 =
  11. 11.118 × 4 =
  12. 12.53 × 4 =
  13. 13.14 × 8 =
  14. 14.27 × 8 =
  15. 15.48 × 4 =
  16. 16.33 × 8 =
  17. 17.154 × 4 =
  18. 18.112 × 4 =
  19. 19.69 × 4 =
  20. 20.43 × 8 =
  21. 21.46 × 4 =
  22. 22.84 × 4 =
  23. 23.64 × 4 =
  24. 24.20 × 8 =
  25. 25.97 × 4 =
  26. 26.102 × 4 =
  27. 27.47 × 8 =
  28. 28.51 × 8 =
  29. 29.159 × 4 =
  30. 30.37 × 4 =
  31. 31.45 × 8 =
  32. 32.25 × 8 =
  33. 33.49 × 8 =
  34. 34.39 × 8 =
  35. 35.91 × 4 =
  36. 36.68 × 4 =
  37. 37.27 × 8 =
  38. 38.60 × 8 =
  39. 39.67 × 8 =
  40. 40.90 × 4 =

Answer key

  1. 432
  2. 408
  3. 192
  4. 588
  5. 368
  6. 208
  7. 528
  8. 456
  9. 392
  10. 120
  11. 472
  12. 212
  13. 112
  14. 216
  15. 192
  16. 264
  17. 616
  18. 448
  19. 276
  20. 344
  21. 184
  22. 336
  23. 256
  24. 160
  25. 388
  26. 408
  27. 376
  28. 408
  29. 636
  30. 148
  31. 360
  32. 200
  33. 392
  34. 312
  35. 364
  36. 272
  37. 216
  38. 480
  39. 536
  40. 360

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