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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 912 · 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. 1.147 × 4 =
  2. 2.37 × 8 =
  3. 3.45 × 4 =
  4. 4.51 × 8 =
  5. 5.121 × 4 =
  6. 6.89 × 4 =
  7. 7.74 × 8 =
  8. 8.20 × 4 =
  9. 9.121 × 4 =
  10. 10.57 × 4 =
  11. 11.48 × 4 =
  12. 12.79 × 4 =
  13. 13.38 × 4 =
  14. 14.54 × 8 =
  15. 15.134 × 4 =
  16. 16.63 × 8 =
  17. 17.73 × 8 =
  18. 18.118 × 4 =
  19. 19.68 × 8 =
  20. 20.64 × 8 =
  21. 21.42 × 4 =
  22. 22.126 × 4 =
  23. 23.65 × 8 =
  24. 24.42 × 4 =
  25. 25.79 × 4 =
  26. 26.38 × 4 =
  27. 27.45 × 4 =
  28. 28.21 × 8 =
  29. 29.74 × 8 =
  30. 30.29 × 8 =
  31. 31.129 × 4 =
  32. 32.108 × 4 =
  33. 33.120 × 4 =
  34. 34.34 × 4 =
  35. 35.25 × 4 =
  36. 36.73 × 8 =
  37. 37.50 × 4 =
  38. 38.106 × 4 =
  39. 39.50 × 4 =
  40. 40.47 × 8 =

Answer key

  1. 588
  2. 296
  3. 180
  4. 408
  5. 484
  6. 356
  7. 592
  8. 80
  9. 484
  10. 228
  11. 192
  12. 316
  13. 152
  14. 432
  15. 536
  16. 504
  17. 584
  18. 472
  19. 544
  20. 512
  21. 168
  22. 504
  23. 520
  24. 168
  25. 316
  26. 152
  27. 180
  28. 168
  29. 592
  30. 232
  31. 516
  32. 432
  33. 480
  34. 136
  35. 100
  36. 584
  37. 200
  38. 424
  39. 200
  40. 376

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