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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 588 · 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. 1.24 × 8 =
  2. 2.22 × 8 =
  3. 3.93 × 4 =
  4. 4.15 × 8 =
  5. 5.28 × 4 =
  6. 6.24 × 8 =
  7. 7.86 × 4 =
  8. 8.56 × 8 =
  9. 9.48 × 8 =
  10. 10.126 × 4 =
  11. 11.18 × 4 =
  12. 12.81 × 4 =
  13. 13.21 × 4 =
  14. 14.17 × 8 =
  15. 15.66 × 4 =
  16. 16.135 × 4 =
  17. 17.42 × 8 =
  18. 18.144 × 4 =
  19. 19.105 × 4 =
  20. 20.66 × 4 =
  21. 21.32 × 8 =
  22. 22.73 × 4 =
  23. 23.47 × 4 =
  24. 24.37 × 8 =
  25. 25.43 × 4 =
  26. 26.74 × 4 =
  27. 27.15 × 8 =
  28. 28.69 × 4 =
  29. 29.30 × 8 =
  30. 30.35 × 8 =
  31. 31.37 × 8 =
  32. 32.56 × 4 =
  33. 33.66 × 8 =
  34. 34.40 × 8 =
  35. 35.109 × 4 =
  36. 36.29 × 8 =
  37. 37.117 × 4 =
  38. 38.75 × 8 =
  39. 39.69 × 8 =
  40. 40.32 × 8 =

Answer key

  1. 192
  2. 176
  3. 372
  4. 120
  5. 112
  6. 192
  7. 344
  8. 448
  9. 384
  10. 504
  11. 72
  12. 324
  13. 84
  14. 136
  15. 264
  16. 540
  17. 336
  18. 576
  19. 420
  20. 264
  21. 256
  22. 292
  23. 188
  24. 296
  25. 172
  26. 296
  27. 120
  28. 276
  29. 240
  30. 280
  31. 296
  32. 224
  33. 528
  34. 320
  35. 436
  36. 232
  37. 468
  38. 600
  39. 552
  40. 256

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