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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 585 · 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. 1.57 × 8 =
  2. 2.46 × 8 =
  3. 3.92 × 4 =
  4. 4.58 × 8 =
  5. 5.44 × 4 =
  6. 6.89 × 4 =
  7. 7.147 × 4 =
  8. 8.47 × 8 =
  9. 9.50 × 4 =
  10. 10.86 × 4 =
  11. 11.37 × 8 =
  12. 12.33 × 8 =
  13. 13.29 × 8 =
  14. 14.86 × 4 =
  15. 15.121 × 4 =
  16. 16.42 × 8 =
  17. 17.29 × 4 =
  18. 18.64 × 8 =
  19. 19.130 × 4 =
  20. 20.13 × 8 =
  21. 21.80 × 4 =
  22. 22.55 × 8 =
  23. 23.48 × 8 =
  24. 24.55 × 8 =
  25. 25.62 × 4 =
  26. 26.29 × 8 =
  27. 27.12 × 8 =
  28. 28.18 × 8 =
  29. 29.75 × 8 =
  30. 30.158 × 4 =
  31. 31.133 × 4 =
  32. 32.38 × 8 =
  33. 33.72 × 4 =
  34. 34.24 × 8 =
  35. 35.82 × 4 =
  36. 36.139 × 4 =
  37. 37.55 × 8 =
  38. 38.23 × 8 =
  39. 39.100 × 4 =
  40. 40.29 × 4 =

Answer key

  1. 456
  2. 368
  3. 368
  4. 464
  5. 176
  6. 356
  7. 588
  8. 376
  9. 200
  10. 344
  11. 296
  12. 264
  13. 232
  14. 344
  15. 484
  16. 336
  17. 116
  18. 512
  19. 520
  20. 104
  21. 320
  22. 440
  23. 384
  24. 440
  25. 248
  26. 232
  27. 96
  28. 144
  29. 600
  30. 632
  31. 532
  32. 304
  33. 288
  34. 192
  35. 328
  36. 556
  37. 440
  38. 184
  39. 400
  40. 116

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