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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 937 · 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. 1.29 × 8 =
  2. 2.42 × 4 =
  3. 3.61 × 4 =
  4. 4.34 × 4 =
  5. 5.70 × 8 =
  6. 6.97 × 4 =
  7. 7.126 × 4 =
  8. 8.146 × 4 =
  9. 9.32 × 8 =
  10. 10.15 × 8 =
  11. 11.28 × 8 =
  12. 12.49 × 8 =
  13. 13.23 × 8 =
  14. 14.137 × 4 =
  15. 15.154 × 4 =
  16. 16.125 × 4 =
  17. 17.151 × 4 =
  18. 18.46 × 8 =
  19. 19.131 × 4 =
  20. 20.45 × 4 =
  21. 21.92 × 4 =
  22. 22.31 × 8 =
  23. 23.157 × 4 =
  24. 24.12 × 8 =
  25. 25.155 × 4 =
  26. 26.40 × 4 =
  27. 27.34 × 8 =
  28. 28.86 × 4 =
  29. 29.113 × 4 =
  30. 30.61 × 4 =
  31. 31.13 × 4 =
  32. 32.108 × 4 =
  33. 33.49 × 8 =
  34. 34.30 × 8 =
  35. 35.73 × 8 =
  36. 36.130 × 4 =
  37. 37.61 × 8 =
  38. 38.43 × 4 =
  39. 39.42 × 8 =
  40. 40.34 × 4 =

Answer key

  1. 232
  2. 168
  3. 244
  4. 136
  5. 560
  6. 388
  7. 504
  8. 584
  9. 256
  10. 120
  11. 224
  12. 392
  13. 184
  14. 548
  15. 616
  16. 500
  17. 604
  18. 368
  19. 524
  20. 180
  21. 368
  22. 248
  23. 628
  24. 96
  25. 620
  26. 160
  27. 272
  28. 344
  29. 452
  30. 244
  31. 52
  32. 432
  33. 392
  34. 240
  35. 584
  36. 520
  37. 488
  38. 172
  39. 336
  40. 136

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