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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 274 · 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. 1.48 × 8 =
  2. 2.36 × 8 =
  3. 3.16 × 4 =
  4. 4.48 × 4 =
  5. 5.51 × 4 =
  6. 6.66 × 4 =
  7. 7.33 × 4 =
  8. 8.12 × 8 =
  9. 9.13 × 8 =
  10. 10.136 × 4 =
  11. 11.24 × 4 =
  12. 12.48 × 4 =
  13. 13.37 × 4 =
  14. 14.49 × 4 =
  15. 15.54 × 4 =
  16. 16.38 × 4 =
  17. 17.78 × 4 =
  18. 18.78 × 4 =
  19. 19.141 × 4 =
  20. 20.36 × 4 =
  21. 21.45 × 4 =
  22. 22.34 × 4 =
  23. 23.72 × 8 =
  24. 24.115 × 4 =
  25. 25.16 × 4 =
  26. 26.69 × 8 =
  27. 27.49 × 8 =
  28. 28.119 × 4 =
  29. 29.150 × 4 =
  30. 30.34 × 4 =
  31. 31.47 × 8 =
  32. 32.40 × 8 =
  33. 33.30 × 8 =
  34. 34.32 × 4 =
  35. 35.42 × 4 =
  36. 36.32 × 8 =
  37. 37.42 × 8 =
  38. 38.23 × 4 =
  39. 39.73 × 4 =
  40. 40.147 × 4 =

Answer key

  1. 384
  2. 288
  3. 64
  4. 192
  5. 204
  6. 264
  7. 132
  8. 96
  9. 104
  10. 544
  11. 96
  12. 192
  13. 148
  14. 196
  15. 216
  16. 152
  17. 312
  18. 312
  19. 564
  20. 144
  21. 180
  22. 136
  23. 576
  24. 460
  25. 64
  26. 552
  27. 392
  28. 476
  29. 600
  30. 136
  31. 376
  32. 320
  33. 240
  34. 128
  35. 168
  36. 256
  37. 336
  38. 92
  39. 292
  40. 588

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