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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 463 · 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. 1.67 × 4 =
  2. 2.157 × 4 =
  3. 3.149 × 4 =
  4. 4.61 × 8 =
  5. 5.126 × 4 =
  6. 6.34 × 4 =
  7. 7.32 × 8 =
  8. 8.21 × 4 =
  9. 9.15 × 8 =
  10. 10.47 × 4 =
  11. 11.27 × 8 =
  12. 12.151 × 4 =
  13. 13.33 × 8 =
  14. 14.63 × 8 =
  15. 15.19 × 8 =
  16. 16.155 × 4 =
  17. 17.55 × 8 =
  18. 18.93 × 4 =
  19. 19.90 × 4 =
  20. 20.37 × 8 =
  21. 21.49 × 8 =
  22. 22.147 × 4 =
  23. 23.48 × 4 =
  24. 24.18 × 4 =
  25. 25.21 × 4 =
  26. 26.40 × 8 =
  27. 27.99 × 4 =
  28. 28.135 × 4 =
  29. 29.41 × 8 =
  30. 30.62 × 8 =
  31. 31.47 × 8 =
  32. 32.25 × 8 =
  33. 33.47 × 8 =
  34. 34.134 × 4 =
  35. 35.150 × 4 =
  36. 36.39 × 8 =
  37. 37.39 × 4 =
  38. 38.67 × 8 =
  39. 39.17 × 4 =
  40. 40.28 × 4 =

Answer key

  1. 268
  2. 628
  3. 596
  4. 488
  5. 504
  6. 136
  7. 256
  8. 84
  9. 120
  10. 188
  11. 216
  12. 604
  13. 264
  14. 504
  15. 152
  16. 620
  17. 440
  18. 372
  19. 360
  20. 296
  21. 392
  22. 588
  23. 192
  24. 72
  25. 84
  26. 320
  27. 396
  28. 540
  29. 328
  30. 496
  31. 376
  32. 200
  33. 376
  34. 536
  35. 600
  36. 312
  37. 156
  38. 536
  39. 68
  40. 112

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