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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 129 · 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. 1.25 × 8 =
  2. 2.58 × 8 =
  3. 3.63 × 8 =
  4. 4.27 × 8 =
  5. 5.65 × 8 =
  6. 6.67 × 4 =
  7. 7.72 × 8 =
  8. 8.29 × 8 =
  9. 9.17 × 8 =
  10. 10.36 × 4 =
  11. 11.39 × 4 =
  12. 12.105 × 4 =
  13. 13.144 × 4 =
  14. 14.60 × 8 =
  15. 15.14 × 8 =
  16. 16.21 × 4 =
  17. 17.58 × 8 =
  18. 18.48 × 8 =
  19. 19.83 × 4 =
  20. 20.120 × 4 =
  21. 21.52 × 8 =
  22. 22.79 × 4 =
  23. 23.22 × 8 =
  24. 24.58 × 8 =
  25. 25.60 × 8 =
  26. 26.45 × 8 =
  27. 27.54 × 8 =
  28. 28.12 × 8 =
  29. 29.31 × 4 =
  30. 30.60 × 8 =
  31. 31.26 × 8 =
  32. 32.35 × 4 =
  33. 33.35 × 8 =
  34. 34.76 × 4 =
  35. 35.49 × 8 =
  36. 36.133 × 4 =
  37. 37.84 × 4 =
  38. 38.97 × 4 =
  39. 39.147 × 4 =
  40. 40.59 × 8 =

Answer key

  1. 200
  2. 464
  3. 504
  4. 216
  5. 520
  6. 268
  7. 576
  8. 232
  9. 136
  10. 144
  11. 156
  12. 420
  13. 576
  14. 480
  15. 112
  16. 84
  17. 464
  18. 384
  19. 332
  20. 480
  21. 416
  22. 316
  23. 176
  24. 464
  25. 480
  26. 360
  27. 432
  28. 96
  29. 124
  30. 480
  31. 208
  32. 140
  33. 280
  34. 304
  35. 392
  36. 532
  37. 336
  38. 388
  39. 588
  40. 472

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