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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 971 · 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. 1.55 × 8 =
  2. 2.55 × 8 =
  3. 3.39 × 4 =
  4. 4.52 × 8 =
  5. 5.42 × 8 =
  6. 6.71 × 8 =
  7. 7.43 × 8 =
  8. 8.12 × 8 =
  9. 9.115 × 4 =
  10. 10.81 × 4 =
  11. 11.32 × 8 =
  12. 12.129 × 4 =
  13. 13.17 × 8 =
  14. 14.75 × 8 =
  15. 15.33 × 8 =
  16. 16.133 × 4 =
  17. 17.30 × 8 =
  18. 18.52 × 8 =
  19. 19.20 × 4 =
  20. 20.115 × 4 =
  21. 21.34 × 4 =
  22. 22.27 × 8 =
  23. 23.58 × 8 =
  24. 24.26 × 4 =
  25. 25.123 × 4 =
  26. 26.50 × 8 =
  27. 27.26 × 4 =
  28. 28.73 × 4 =
  29. 29.69 × 4 =
  30. 30.46 × 8 =
  31. 31.68 × 8 =
  32. 32.148 × 4 =
  33. 33.111 × 4 =
  34. 34.66 × 8 =
  35. 35.73 × 8 =
  36. 36.69 × 4 =
  37. 37.46 × 8 =
  38. 38.81 × 4 =
  39. 39.33 × 8 =
  40. 40.159 × 4 =

Answer key

  1. 440
  2. 440
  3. 156
  4. 416
  5. 336
  6. 568
  7. 344
  8. 96
  9. 460
  10. 324
  11. 256
  12. 516
  13. 136
  14. 600
  15. 264
  16. 532
  17. 240
  18. 416
  19. 80
  20. 460
  21. 136
  22. 216
  23. 464
  24. 104
  25. 492
  26. 400
  27. 104
  28. 292
  29. 276
  30. 368
  31. 544
  32. 592
  33. 444
  34. 528
  35. 584
  36. 276
  37. 368
  38. 324
  39. 264
  40. 636

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