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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 955 · 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. 1.12 × 8 =
  2. 2.41 × 8 =
  3. 3.156 × 4 =
  4. 4.134 × 4 =
  5. 5.98 × 4 =
  6. 6.29 × 8 =
  7. 7.86 × 4 =
  8. 8.38 × 8 =
  9. 9.140 × 4 =
  10. 10.39 × 8 =
  11. 11.160 × 4 =
  12. 12.115 × 4 =
  13. 13.73 × 4 =
  14. 14.45 × 4 =
  15. 15.103 × 4 =
  16. 16.156 × 4 =
  17. 17.22 × 8 =
  18. 18.128 × 4 =
  19. 19.70 × 8 =
  20. 20.147 × 4 =
  21. 21.50 × 8 =
  22. 22.30 × 8 =
  23. 23.35 × 8 =
  24. 24.120 × 4 =
  25. 25.12 × 8 =
  26. 26.47 × 4 =
  27. 27.39 × 8 =
  28. 28.26 × 8 =
  29. 29.19 × 8 =
  30. 30.26 × 4 =
  31. 31.21 × 4 =
  32. 32.34 × 4 =
  33. 33.72 × 8 =
  34. 34.112 × 4 =
  35. 35.111 × 4 =
  36. 36.18 × 8 =
  37. 37.123 × 4 =
  38. 38.150 × 4 =
  39. 39.108 × 4 =
  40. 40.21 × 8 =

Answer key

  1. 96
  2. 328
  3. 624
  4. 536
  5. 392
  6. 232
  7. 344
  8. 304
  9. 560
  10. 312
  11. 640
  12. 460
  13. 292
  14. 180
  15. 412
  16. 624
  17. 176
  18. 512
  19. 560
  20. 588
  21. 400
  22. 240
  23. 280
  24. 480
  25. 96
  26. 188
  27. 312
  28. 208
  29. 152
  30. 104
  31. 84
  32. 136
  33. 576
  34. 448
  35. 444
  36. 144
  37. 492
  38. 600
  39. 432
  40. 168

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