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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 980 · 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. 1.28 × 8 =
  2. 2.126 × 4 =
  3. 3.30 × 8 =
  4. 4.64 × 8 =
  5. 5.35 × 4 =
  6. 6.84 × 4 =
  7. 7.13 × 4 =
  8. 8.43 × 8 =
  9. 9.151 × 4 =
  10. 10.40 × 8 =
  11. 11.154 × 4 =
  12. 12.109 × 4 =
  13. 13.29 × 4 =
  14. 14.90 × 4 =
  15. 15.34 × 4 =
  16. 16.17 × 4 =
  17. 17.55 × 8 =
  18. 18.29 × 8 =
  19. 19.108 × 4 =
  20. 20.71 × 8 =
  21. 21.68 × 8 =
  22. 22.105 × 4 =
  23. 23.25 × 4 =
  24. 24.31 × 8 =
  25. 25.23 × 4 =
  26. 26.29 × 8 =
  27. 27.13 × 8 =
  28. 28.61 × 8 =
  29. 29.14 × 8 =
  30. 30.138 × 4 =
  31. 31.72 × 8 =
  32. 32.103 × 4 =
  33. 33.52 × 8 =
  34. 34.20 × 8 =
  35. 35.132 × 4 =
  36. 36.58 × 4 =
  37. 37.47 × 8 =
  38. 38.28 × 4 =
  39. 39.104 × 4 =
  40. 40.82 × 4 =

Answer key

  1. 224
  2. 504
  3. 240
  4. 512
  5. 140
  6. 336
  7. 52
  8. 344
  9. 604
  10. 320
  11. 616
  12. 436
  13. 116
  14. 360
  15. 136
  16. 68
  17. 440
  18. 232
  19. 432
  20. 568
  21. 544
  22. 420
  23. 100
  24. 248
  25. 92
  26. 232
  27. 104
  28. 488
  29. 112
  30. 552
  31. 576
  32. 412
  33. 416
  34. 160
  35. 528
  36. 232
  37. 376
  38. 112
  39. 416
  40. 328

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