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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 911 · 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. 1.41 × 4 =
  2. 2.138 × 4 =
  3. 3.71 × 8 =
  4. 4.69 × 8 =
  5. 5.47 × 4 =
  6. 6.41 × 4 =
  7. 7.26 × 8 =
  8. 8.44 × 4 =
  9. 9.12 × 8 =
  10. 10.108 × 4 =
  11. 11.150 × 4 =
  12. 12.88 × 4 =
  13. 13.61 × 8 =
  14. 14.13 × 8 =
  15. 15.53 × 8 =
  16. 16.66 × 8 =
  17. 17.40 × 8 =
  18. 18.39 × 8 =
  19. 19.57 × 8 =
  20. 20.49 × 4 =
  21. 21.73 × 4 =
  22. 22.24 × 4 =
  23. 23.17 × 8 =
  24. 24.49 × 4 =
  25. 25.72 × 8 =
  26. 26.64 × 8 =
  27. 27.16 × 8 =
  28. 28.45 × 8 =
  29. 29.29 × 8 =
  30. 30.15 × 8 =
  31. 31.72 × 8 =
  32. 32.52 × 8 =
  33. 33.49 × 8 =
  34. 34.12 × 8 =
  35. 35.81 × 4 =
  36. 36.83 × 4 =
  37. 37.149 × 4 =
  38. 38.89 × 4 =
  39. 39.69 × 8 =
  40. 40.57 × 8 =

Answer key

  1. 164
  2. 552
  3. 568
  4. 552
  5. 188
  6. 164
  7. 208
  8. 176
  9. 96
  10. 432
  11. 600
  12. 352
  13. 488
  14. 104
  15. 424
  16. 528
  17. 320
  18. 312
  19. 456
  20. 196
  21. 292
  22. 96
  23. 136
  24. 196
  25. 576
  26. 512
  27. 128
  28. 360
  29. 232
  30. 120
  31. 576
  32. 416
  33. 392
  34. 96
  35. 324
  36. 332
  37. 596
  38. 356
  39. 552
  40. 456

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