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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 791 · 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. 1.41 × 8 =
  2. 2.139 × 4 =
  3. 3.33 × 4 =
  4. 4.128 × 4 =
  5. 5.37 × 8 =
  6. 6.42 × 8 =
  7. 7.26 × 8 =
  8. 8.25 × 8 =
  9. 9.25 × 8 =
  10. 10.61 × 4 =
  11. 11.42 × 4 =
  12. 12.133 × 4 =
  13. 13.70 × 4 =
  14. 14.13 × 8 =
  15. 15.53 × 8 =
  16. 16.47 × 4 =
  17. 17.81 × 4 =
  18. 18.39 × 4 =
  19. 19.56 × 4 =
  20. 20.43 × 4 =
  21. 21.70 × 8 =
  22. 22.24 × 8 =
  23. 23.23 × 8 =
  24. 24.75 × 4 =
  25. 25.38 × 8 =
  26. 26.127 × 4 =
  27. 27.118 × 4 =
  28. 28.41 × 4 =
  29. 29.15 × 8 =
  30. 30.46 × 4 =
  31. 31.41 × 8 =
  32. 32.47 × 4 =
  33. 33.17 × 8 =
  34. 34.34 × 8 =
  35. 35.27 × 4 =
  36. 36.83 × 4 =
  37. 37.60 × 8 =
  38. 38.40 × 8 =
  39. 39.117 × 4 =
  40. 40.72 × 8 =

Answer key

  1. 328
  2. 556
  3. 132
  4. 512
  5. 296
  6. 336
  7. 208
  8. 200
  9. 200
  10. 244
  11. 168
  12. 532
  13. 280
  14. 104
  15. 424
  16. 188
  17. 324
  18. 156
  19. 224
  20. 172
  21. 560
  22. 192
  23. 184
  24. 300
  25. 304
  26. 508
  27. 472
  28. 164
  29. 120
  30. 184
  31. 328
  32. 188
  33. 136
  34. 272
  35. 108
  36. 332
  37. 480
  38. 320
  39. 468
  40. 576

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