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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 731 · 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. 1.75 × 4 =
  2. 2.25 × 4 =
  3. 3.14 × 4 =
  4. 4.74 × 4 =
  5. 5.27 × 8 =
  6. 6.141 × 4 =
  7. 7.112 × 4 =
  8. 8.46 × 4 =
  9. 9.74 × 4 =
  10. 10.32 × 4 =
  11. 11.52 × 4 =
  12. 12.17 × 4 =
  13. 13.70 × 4 =
  14. 14.137 × 4 =
  15. 15.114 × 4 =
  16. 16.42 × 4 =
  17. 17.24 × 4 =
  18. 18.121 × 4 =
  19. 19.113 × 4 =
  20. 20.52 × 4 =
  21. 21.55 × 8 =
  22. 22.55 × 8 =
  23. 23.51 × 4 =
  24. 24.86 × 4 =
  25. 25.126 × 4 =
  26. 26.75 × 8 =
  27. 27.76 × 4 =
  28. 28.64 × 4 =
  29. 29.21 × 8 =
  30. 30.21 × 8 =
  31. 31.53 × 4 =
  32. 32.117 × 4 =
  33. 33.46 × 8 =
  34. 34.44 × 8 =
  35. 35.89 × 4 =
  36. 36.51 × 8 =
  37. 37.137 × 4 =
  38. 38.45 × 8 =
  39. 39.66 × 4 =
  40. 40.79 × 4 =

Answer key

  1. 300
  2. 100
  3. 56
  4. 296
  5. 216
  6. 564
  7. 448
  8. 184
  9. 296
  10. 128
  11. 208
  12. 68
  13. 280
  14. 548
  15. 456
  16. 168
  17. 96
  18. 484
  19. 452
  20. 208
  21. 440
  22. 440
  23. 204
  24. 344
  25. 504
  26. 600
  27. 304
  28. 256
  29. 168
  30. 168
  31. 212
  32. 468
  33. 368
  34. 352
  35. 356
  36. 408
  37. 548
  38. 360
  39. 264
  40. 316

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