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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 9 · 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. 1.16 × 4 =
  2. 2.28 × 8 =
  3. 3.70 × 4 =
  4. 4.16 × 4 =
  5. 5.27 × 4 =
  6. 6.18 × 8 =
  7. 7.67 × 8 =
  8. 8.33 × 8 =
  9. 9.56 × 8 =
  10. 10.53 × 4 =
  11. 11.75 × 8 =
  12. 12.127 × 4 =
  13. 13.44 × 8 =
  14. 14.81 × 4 =
  15. 15.33 × 4 =
  16. 16.67 × 4 =
  17. 17.27 × 8 =
  18. 18.54 × 8 =
  19. 19.73 × 4 =
  20. 20.21 × 8 =
  21. 21.38 × 8 =
  22. 22.51 × 4 =
  23. 23.13 × 8 =
  24. 24.18 × 8 =
  25. 25.55 × 8 =
  26. 26.157 × 4 =
  27. 27.27 × 4 =
  28. 28.14 × 4 =
  29. 29.54 × 4 =
  30. 30.31 × 8 =
  31. 31.52 × 4 =
  32. 32.76 × 4 =
  33. 33.47 × 8 =
  34. 34.17 × 4 =
  35. 35.100 × 4 =
  36. 36.102 × 4 =
  37. 37.128 × 4 =
  38. 38.71 × 8 =
  39. 39.28 × 8 =
  40. 40.39 × 8 =

Answer key

  1. 64
  2. 224
  3. 280
  4. 64
  5. 108
  6. 144
  7. 536
  8. 264
  9. 448
  10. 212
  11. 600
  12. 508
  13. 352
  14. 324
  15. 132
  16. 268
  17. 216
  18. 432
  19. 292
  20. 168
  21. 304
  22. 204
  23. 104
  24. 144
  25. 440
  26. 628
  27. 108
  28. 56
  29. 216
  30. 248
  31. 208
  32. 304
  33. 376
  34. 68
  35. 400
  36. 408
  37. 512
  38. 568
  39. 224
  40. 312

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