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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 938 · 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. 1.37 × 8 =
  2. 2.34 × 4 =
  3. 3.89 × 4 =
  4. 4.71 × 8 =
  5. 5.35 × 8 =
  6. 6.20 × 8 =
  7. 7.139 × 4 =
  8. 8.16 × 8 =
  9. 9.34 × 8 =
  10. 10.20 × 8 =
  11. 11.31 × 8 =
  12. 12.49 × 8 =
  13. 13.102 × 4 =
  14. 14.64 × 8 =
  15. 15.94 × 4 =
  16. 16.34 × 8 =
  17. 17.54 × 8 =
  18. 18.36 × 8 =
  19. 19.26 × 8 =
  20. 20.34 × 4 =
  21. 21.49 × 4 =
  22. 22.64 × 8 =
  23. 23.59 × 8 =
  24. 24.33 × 8 =
  25. 25.74 × 8 =
  26. 26.43 × 4 =
  27. 27.136 × 4 =
  28. 28.50 × 8 =
  29. 29.68 × 4 =
  30. 30.24 × 8 =
  31. 31.131 × 4 =
  32. 32.21 × 4 =
  33. 33.51 × 8 =
  34. 34.68 × 8 =
  35. 35.30 × 8 =
  36. 36.15 × 4 =
  37. 37.151 × 4 =
  38. 38.26 × 8 =
  39. 39.47 × 8 =
  40. 40.20 × 4 =

Answer key

  1. 296
  2. 136
  3. 356
  4. 568
  5. 280
  6. 160
  7. 556
  8. 128
  9. 272
  10. 160
  11. 248
  12. 392
  13. 408
  14. 512
  15. 376
  16. 272
  17. 432
  18. 288
  19. 208
  20. 136
  21. 196
  22. 512
  23. 472
  24. 264
  25. 592
  26. 172
  27. 544
  28. 400
  29. 272
  30. 192
  31. 524
  32. 84
  33. 408
  34. 544
  35. 240
  36. 60
  37. 604
  38. 208
  39. 376
  40. 80

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