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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 483 · 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. 1.18 × 8 =
  2. 2.14 × 8 =
  3. 3.121 × 4 =
  4. 4.13 × 8 =
  5. 5.34 × 8 =
  6. 6.58 × 8 =
  7. 7.78 × 4 =
  8. 8.51 × 4 =
  9. 9.53 × 8 =
  10. 10.36 × 4 =
  11. 11.36 × 4 =
  12. 12.23 × 4 =
  13. 13.48 × 8 =
  14. 14.73 × 8 =
  15. 15.60 × 4 =
  16. 16.35 × 8 =
  17. 17.54 × 8 =
  18. 18.53 × 8 =
  19. 19.41 × 8 =
  20. 20.50 × 8 =
  21. 21.39 × 4 =
  22. 22.27 × 4 =
  23. 23.49 × 8 =
  24. 24.27 × 4 =
  25. 25.123 × 4 =
  26. 26.122 × 4 =
  27. 27.41 × 4 =
  28. 28.74 × 8 =
  29. 29.130 × 4 =
  30. 30.39 × 8 =
  31. 31.74 × 8 =
  32. 32.45 × 4 =
  33. 33.62 × 8 =
  34. 34.70 × 8 =
  35. 35.20 × 4 =
  36. 36.101 × 4 =
  37. 37.144 × 4 =
  38. 38.37 × 8 =
  39. 39.87 × 4 =
  40. 40.81 × 4 =

Answer key

  1. 144
  2. 112
  3. 484
  4. 104
  5. 272
  6. 464
  7. 312
  8. 204
  9. 424
  10. 144
  11. 144
  12. 92
  13. 384
  14. 584
  15. 240
  16. 280
  17. 432
  18. 424
  19. 328
  20. 400
  21. 156
  22. 108
  23. 392
  24. 108
  25. 492
  26. 488
  27. 164
  28. 592
  29. 520
  30. 312
  31. 592
  32. 180
  33. 496
  34. 560
  35. 80
  36. 404
  37. 576
  38. 296
  39. 348
  40. 324

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