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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 915 · 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. 1.63 × 4 =
  2. 2.38 × 4 =
  3. 3.70 × 8 =
  4. 4.32 × 8 =
  5. 5.28 × 8 =
  6. 6.20 × 8 =
  7. 7.60 × 4 =
  8. 8.68 × 8 =
  9. 9.113 × 4 =
  10. 10.67 × 4 =
  11. 11.54 × 8 =
  12. 12.39 × 4 =
  13. 13.71 × 4 =
  14. 14.56 × 4 =
  15. 15.137 × 4 =
  16. 16.83 × 4 =
  17. 17.46 × 4 =
  18. 18.154 × 4 =
  19. 19.72 × 4 =
  20. 20.48 × 8 =
  21. 21.147 × 4 =
  22. 22.121 × 4 =
  23. 23.58 × 8 =
  24. 24.115 × 4 =
  25. 25.22 × 8 =
  26. 26.72 × 4 =
  27. 27.18 × 4 =
  28. 28.26 × 4 =
  29. 29.49 × 4 =
  30. 30.30 × 8 =
  31. 31.27 × 8 =
  32. 32.18 × 8 =
  33. 33.64 × 8 =
  34. 34.23 × 8 =
  35. 35.39 × 8 =
  36. 36.89 × 4 =
  37. 37.70 × 8 =
  38. 38.51 × 4 =
  39. 39.139 × 4 =
  40. 40.154 × 4 =

Answer key

  1. 252
  2. 152
  3. 560
  4. 256
  5. 224
  6. 160
  7. 240
  8. 544
  9. 452
  10. 268
  11. 432
  12. 156
  13. 284
  14. 224
  15. 548
  16. 332
  17. 184
  18. 616
  19. 288
  20. 384
  21. 588
  22. 484
  23. 464
  24. 460
  25. 176
  26. 288
  27. 72
  28. 104
  29. 196
  30. 240
  31. 216
  32. 144
  33. 512
  34. 184
  35. 312
  36. 356
  37. 560
  38. 204
  39. 556
  40. 616

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