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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 957 · 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. 1.56 × 8 =
  2. 2.68 × 8 =
  3. 3.59 × 8 =
  4. 4.54 × 8 =
  5. 5.120 × 4 =
  6. 6.13 × 8 =
  7. 7.156 × 4 =
  8. 8.81 × 4 =
  9. 9.160 × 4 =
  10. 10.95 × 4 =
  11. 11.30 × 8 =
  12. 12.103 × 4 =
  13. 13.27 × 8 =
  14. 14.154 × 4 =
  15. 15.105 × 4 =
  16. 16.48 × 4 =
  17. 17.59 × 8 =
  18. 18.28 × 4 =
  19. 19.16 × 8 =
  20. 20.102 × 4 =
  21. 21.25 × 8 =
  22. 22.54 × 8 =
  23. 23.35 × 8 =
  24. 24.31 × 4 =
  25. 25.149 × 4 =
  26. 26.46 × 4 =
  27. 27.29 × 4 =
  28. 28.32 × 8 =
  29. 29.18 × 8 =
  30. 30.51 × 4 =
  31. 31.42 × 8 =
  32. 32.151 × 4 =
  33. 33.122 × 4 =
  34. 34.64 × 8 =
  35. 35.26 × 8 =
  36. 36.75 × 8 =
  37. 37.19 × 4 =
  38. 38.159 × 4 =
  39. 39.69 × 8 =
  40. 40.113 × 4 =

Answer key

  1. 448
  2. 544
  3. 472
  4. 432
  5. 480
  6. 104
  7. 624
  8. 324
  9. 640
  10. 380
  11. 240
  12. 412
  13. 216
  14. 616
  15. 420
  16. 192
  17. 472
  18. 112
  19. 128
  20. 408
  21. 200
  22. 432
  23. 280
  24. 124
  25. 596
  26. 184
  27. 116
  28. 256
  29. 144
  30. 204
  31. 336
  32. 604
  33. 488
  34. 512
  35. 208
  36. 600
  37. 76
  38. 636
  39. 552
  40. 452

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