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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 454 · 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. 1.70 × 4 =
  2. 2.89 × 4 =
  3. 3.151 × 4 =
  4. 4.24 × 8 =
  5. 5.70 × 8 =
  6. 6.38 × 4 =
  7. 7.37 × 8 =
  8. 8.136 × 4 =
  9. 9.20 × 4 =
  10. 10.135 × 4 =
  11. 11.53 × 8 =
  12. 12.60 × 4 =
  13. 13.67 × 8 =
  14. 14.45 × 8 =
  15. 15.15 × 4 =
  16. 16.25 × 8 =
  17. 17.20 × 4 =
  18. 18.17 × 4 =
  19. 19.93 × 4 =
  20. 20.27 × 8 =
  21. 21.18 × 8 =
  22. 22.24 × 8 =
  23. 23.160 × 4 =
  24. 24.139 × 4 =
  25. 25.111 × 4 =
  26. 26.42 × 8 =
  27. 27.32 × 8 =
  28. 28.13 × 8 =
  29. 29.126 × 4 =
  30. 30.70 × 8 =
  31. 31.14 × 8 =
  32. 32.13 × 8 =
  33. 33.17 × 8 =
  34. 34.84 × 4 =
  35. 35.15 × 4 =
  36. 36.132 × 4 =
  37. 37.149 × 4 =
  38. 38.126 × 4 =
  39. 39.48 × 8 =
  40. 40.67 × 4 =

Answer key

  1. 280
  2. 356
  3. 604
  4. 192
  5. 560
  6. 152
  7. 296
  8. 544
  9. 80
  10. 540
  11. 424
  12. 240
  13. 536
  14. 360
  15. 60
  16. 200
  17. 80
  18. 68
  19. 372
  20. 216
  21. 144
  22. 192
  23. 640
  24. 556
  25. 444
  26. 336
  27. 256
  28. 104
  29. 504
  30. 560
  31. 112
  32. 104
  33. 136
  34. 336
  35. 60
  36. 528
  37. 596
  38. 504
  39. 384
  40. 268

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