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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 932 · 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. 1.25 × 8 =
  2. 2.40 × 8 =
  3. 3.147 × 4 =
  4. 4.40 × 8 =
  5. 5.45 × 4 =
  6. 6.106 × 4 =
  7. 7.14 × 8 =
  8. 8.150 × 4 =
  9. 9.65 × 8 =
  10. 10.66 × 4 =
  11. 11.26 × 8 =
  12. 12.145 × 4 =
  13. 13.131 × 4 =
  14. 14.155 × 4 =
  15. 15.15 × 8 =
  16. 16.61 × 8 =
  17. 17.21 × 4 =
  18. 18.61 × 8 =
  19. 19.82 × 4 =
  20. 20.27 × 8 =
  21. 21.48 × 4 =
  22. 22.14 × 4 =
  23. 23.73 × 8 =
  24. 24.21 × 4 =
  25. 25.13 × 8 =
  26. 26.72 × 4 =
  27. 27.52 × 8 =
  28. 28.29 × 8 =
  29. 29.30 × 8 =
  30. 30.64 × 8 =
  31. 31.73 × 8 =
  32. 32.51 × 8 =
  33. 33.110 × 4 =
  34. 34.108 × 4 =
  35. 35.26 × 4 =
  36. 36.29 × 8 =
  37. 37.66 × 4 =
  38. 38.77 × 4 =
  39. 39.58 × 8 =
  40. 40.60 × 8 =

Answer key

  1. 200
  2. 320
  3. 588
  4. 320
  5. 180
  6. 424
  7. 112
  8. 600
  9. 520
  10. 264
  11. 208
  12. 580
  13. 524
  14. 620
  15. 120
  16. 488
  17. 84
  18. 488
  19. 328
  20. 216
  21. 192
  22. 56
  23. 584
  24. 84
  25. 104
  26. 288
  27. 416
  28. 232
  29. 240
  30. 512
  31. 584
  32. 408
  33. 440
  34. 432
  35. 104
  36. 232
  37. 264
  38. 308
  39. 464
  40. 480

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