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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 551 · 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. 1.13 × 4 =
  2. 2.41 × 8 =
  3. 3.54 × 4 =
  4. 4.47 × 8 =
  5. 5.39 × 4 =
  6. 6.39 × 8 =
  7. 7.81 × 4 =
  8. 8.29 × 8 =
  9. 9.48 × 8 =
  10. 10.33 × 8 =
  11. 11.20 × 8 =
  12. 12.128 × 4 =
  13. 13.34 × 4 =
  14. 14.47 × 4 =
  15. 15.127 × 4 =
  16. 16.13 × 4 =
  17. 17.37 × 8 =
  18. 18.24 × 8 =
  19. 19.45 × 8 =
  20. 20.50 × 4 =
  21. 21.24 × 8 =
  22. 22.37 × 4 =
  23. 23.51 × 4 =
  24. 24.48 × 8 =
  25. 25.67 × 8 =
  26. 26.61 × 4 =
  27. 27.61 × 8 =
  28. 28.136 × 4 =
  29. 29.50 × 8 =
  30. 30.43 × 8 =
  31. 31.40 × 4 =
  32. 32.67 × 4 =
  33. 33.67 × 4 =
  34. 34.66 × 4 =
  35. 35.69 × 8 =
  36. 36.45 × 8 =
  37. 37.94 × 4 =
  38. 38.26 × 8 =
  39. 39.26 × 8 =
  40. 40.42 × 8 =

Answer key

  1. 52
  2. 328
  3. 216
  4. 376
  5. 156
  6. 312
  7. 324
  8. 232
  9. 384
  10. 264
  11. 160
  12. 512
  13. 136
  14. 188
  15. 508
  16. 52
  17. 296
  18. 192
  19. 360
  20. 200
  21. 192
  22. 148
  23. 204
  24. 384
  25. 536
  26. 244
  27. 488
  28. 544
  29. 400
  30. 344
  31. 160
  32. 268
  33. 268
  34. 264
  35. 552
  36. 360
  37. 376
  38. 208
  39. 208
  40. 336

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