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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 804 · 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. 1.33 × 8 =
  2. 2.42 × 8 =
  3. 3.25 × 8 =
  4. 4.54 × 4 =
  5. 5.29 × 4 =
  6. 6.69 × 8 =
  7. 7.125 × 4 =
  8. 8.73 × 4 =
  9. 9.19 × 8 =
  10. 10.17 × 8 =
  11. 11.130 × 4 =
  12. 12.25 × 8 =
  13. 13.100 × 4 =
  14. 14.33 × 8 =
  15. 15.141 × 4 =
  16. 16.58 × 8 =
  17. 17.94 × 4 =
  18. 18.69 × 8 =
  19. 19.47 × 4 =
  20. 20.23 × 8 =
  21. 21.31 × 4 =
  22. 22.33 × 8 =
  23. 23.15 × 4 =
  24. 24.43 × 8 =
  25. 25.34 × 8 =
  26. 26.22 × 8 =
  27. 27.24 × 8 =
  28. 28.36 × 4 =
  29. 29.37 × 8 =
  30. 30.64 × 8 =
  31. 31.67 × 8 =
  32. 32.24 × 8 =
  33. 33.76 × 4 =
  34. 34.23 × 4 =
  35. 35.27 × 4 =
  36. 36.54 × 8 =
  37. 37.59 × 8 =
  38. 38.53 × 4 =
  39. 39.24 × 8 =
  40. 40.34 × 8 =

Answer key

  1. 264
  2. 336
  3. 200
  4. 216
  5. 116
  6. 552
  7. 500
  8. 292
  9. 152
  10. 136
  11. 520
  12. 200
  13. 400
  14. 264
  15. 564
  16. 464
  17. 376
  18. 552
  19. 188
  20. 184
  21. 124
  22. 264
  23. 60
  24. 344
  25. 272
  26. 176
  27. 192
  28. 144
  29. 296
  30. 512
  31. 536
  32. 192
  33. 304
  34. 92
  35. 108
  36. 432
  37. 472
  38. 212
  39. 192
  40. 272

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