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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 997 · 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. 1.50 × 8 =
  2. 2.55 × 8 =
  3. 3.87 × 4 =
  4. 4.53 × 4 =
  5. 5.34 × 8 =
  6. 6.73 × 8 =
  7. 7.68 × 8 =
  8. 8.116 × 4 =
  9. 9.147 × 4 =
  10. 10.15 × 8 =
  11. 11.29 × 8 =
  12. 12.126 × 4 =
  13. 13.27 × 4 =
  14. 14.37 × 8 =
  15. 15.61 × 8 =
  16. 16.13 × 8 =
  17. 17.55 × 8 =
  18. 18.97 × 4 =
  19. 19.45 × 4 =
  20. 20.96 × 4 =
  21. 21.47 × 8 =
  22. 22.76 × 4 =
  23. 23.95 × 4 =
  24. 24.39 × 8 =
  25. 25.66 × 4 =
  26. 26.53 × 4 =
  27. 27.23 × 8 =
  28. 28.42 × 8 =
  29. 29.127 × 4 =
  30. 30.115 × 4 =
  31. 31.75 × 8 =
  32. 32.104 × 4 =
  33. 33.34 × 8 =
  34. 34.45 × 8 =
  35. 35.103 × 4 =
  36. 36.29 × 8 =
  37. 37.15 × 8 =
  38. 38.29 × 8 =
  39. 39.47 × 8 =
  40. 40.52 × 8 =

Answer key

  1. 400
  2. 440
  3. 348
  4. 212
  5. 272
  6. 584
  7. 544
  8. 464
  9. 588
  10. 120
  11. 232
  12. 504
  13. 108
  14. 296
  15. 488
  16. 104
  17. 440
  18. 388
  19. 180
  20. 384
  21. 376
  22. 304
  23. 380
  24. 312
  25. 264
  26. 212
  27. 184
  28. 336
  29. 508
  30. 460
  31. 600
  32. 416
  33. 272
  34. 360
  35. 412
  36. 232
  37. 120
  38. 232
  39. 376
  40. 416

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