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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 949 · 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. 1.41 × 8 =
  2. 2.25 × 8 =
  3. 3.20 × 4 =
  4. 4.157 × 4 =
  5. 5.48 × 8 =
  6. 6.21 × 8 =
  7. 7.20 × 4 =
  8. 8.55 × 8 =
  9. 9.82 × 4 =
  10. 10.65 × 4 =
  11. 11.35 × 4 =
  12. 12.120 × 4 =
  13. 13.94 × 4 =
  14. 14.93 × 4 =
  15. 15.46 × 8 =
  16. 16.22 × 8 =
  17. 17.19 × 4 =
  18. 18.55 × 8 =
  19. 19.83 × 4 =
  20. 20.78 × 4 =
  21. 21.147 × 4 =
  22. 22.135 × 4 =
  23. 23.41 × 8 =
  24. 24.65 × 4 =
  25. 25.59 × 4 =
  26. 26.43 × 8 =
  27. 27.149 × 4 =
  28. 28.32 × 8 =
  29. 29.56 × 8 =
  30. 30.26 × 4 =
  31. 31.53 × 4 =
  32. 32.19 × 8 =
  33. 33.75 × 4 =
  34. 34.57 × 8 =
  35. 35.29 × 8 =
  36. 36.31 × 8 =
  37. 37.109 × 4 =
  38. 38.86 × 4 =
  39. 39.48 × 8 =
  40. 40.12 × 8 =

Answer key

  1. 328
  2. 200
  3. 80
  4. 628
  5. 384
  6. 168
  7. 80
  8. 440
  9. 328
  10. 260
  11. 140
  12. 480
  13. 376
  14. 372
  15. 368
  16. 176
  17. 76
  18. 440
  19. 332
  20. 312
  21. 588
  22. 540
  23. 328
  24. 260
  25. 236
  26. 344
  27. 596
  28. 256
  29. 448
  30. 104
  31. 212
  32. 152
  33. 300
  34. 456
  35. 232
  36. 248
  37. 436
  38. 344
  39. 384
  40. 96

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