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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 960 · 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. 1.158 × 4 =
  2. 2.40 × 8 =
  3. 3.21 × 4 =
  4. 4.97 × 4 =
  5. 5.160 × 4 =
  6. 6.30 × 8 =
  7. 7.39 × 4 =
  8. 8.50 × 4 =
  9. 9.48 × 8 =
  10. 10.47 × 8 =
  11. 11.24 × 8 =
  12. 12.95 × 4 =
  13. 13.43 × 8 =
  14. 14.63 × 8 =
  15. 15.61 × 4 =
  16. 16.151 × 4 =
  17. 17.45 × 4 =
  18. 18.69 × 8 =
  19. 19.39 × 4 =
  20. 20.93 × 4 =
  21. 21.31 × 4 =
  22. 22.16 × 8 =
  23. 23.119 × 4 =
  24. 24.42 × 8 =
  25. 25.81 × 4 =
  26. 26.33 × 8 =
  27. 27.99 × 4 =
  28. 28.43 × 8 =
  29. 29.31 × 8 =
  30. 30.101 × 4 =
  31. 31.24 × 8 =
  32. 32.71 × 8 =
  33. 33.43 × 8 =
  34. 34.56 × 8 =
  35. 35.57 × 8 =
  36. 36.21 × 8 =
  37. 37.122 × 4 =
  38. 38.21 × 8 =
  39. 39.63 × 8 =
  40. 40.34 × 8 =

Answer key

  1. 632
  2. 320
  3. 84
  4. 388
  5. 640
  6. 240
  7. 156
  8. 200
  9. 384
  10. 376
  11. 192
  12. 380
  13. 344
  14. 504
  15. 244
  16. 604
  17. 180
  18. 552
  19. 156
  20. 372
  21. 124
  22. 128
  23. 476
  24. 336
  25. 324
  26. 264
  27. 396
  28. 344
  29. 248
  30. 404
  31. 192
  32. 568
  33. 344
  34. 448
  35. 456
  36. 168
  37. 488
  38. 168
  39. 504
  40. 272

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