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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 926 · 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. 1.133 × 4 =
  2. 2.71 × 8 =
  3. 3.27 × 4 =
  4. 4.49 × 4 =
  5. 5.79 × 4 =
  6. 6.55 × 8 =
  7. 7.64 × 8 =
  8. 8.75 × 8 =
  9. 9.54 × 8 =
  10. 10.146 × 4 =
  11. 11.47 × 4 =
  12. 12.35 × 8 =
  13. 13.158 × 4 =
  14. 14.29 × 8 =
  15. 15.54 × 8 =
  16. 16.57 × 8 =
  17. 17.59 × 8 =
  18. 18.38 × 4 =
  19. 19.135 × 4 =
  20. 20.24 × 8 =
  21. 21.68 × 8 =
  22. 22.37 × 8 =
  23. 23.143 × 4 =
  24. 24.56 × 8 =
  25. 25.69 × 8 =
  26. 26.26 × 8 =
  27. 27.27 × 8 =
  28. 28.25 × 8 =
  29. 29.30 × 8 =
  30. 30.13 × 8 =
  31. 31.15 × 8 =
  32. 32.83 × 4 =
  33. 33.51 × 8 =
  34. 34.15 × 8 =
  35. 35.52 × 8 =
  36. 36.68 × 8 =
  37. 37.101 × 4 =
  38. 38.35 × 8 =
  39. 39.103 × 4 =
  40. 40.64 × 8 =

Answer key

  1. 532
  2. 568
  3. 108
  4. 196
  5. 316
  6. 440
  7. 512
  8. 600
  9. 432
  10. 584
  11. 188
  12. 280
  13. 632
  14. 232
  15. 432
  16. 456
  17. 472
  18. 152
  19. 540
  20. 192
  21. 544
  22. 296
  23. 572
  24. 448
  25. 552
  26. 208
  27. 216
  28. 200
  29. 240
  30. 104
  31. 120
  32. 332
  33. 408
  34. 120
  35. 416
  36. 544
  37. 404
  38. 280
  39. 412
  40. 512

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