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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 838 · 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. 1.19 × 8 =
  2. 2.68 × 4 =
  3. 3.38 × 8 =
  4. 4.64 × 4 =
  5. 5.152 × 4 =
  6. 6.142 × 4 =
  7. 7.122 × 4 =
  8. 8.33 × 4 =
  9. 9.28 × 8 =
  10. 10.60 × 8 =
  11. 11.57 × 4 =
  12. 12.95 × 4 =
  13. 13.70 × 8 =
  14. 14.52 × 8 =
  15. 15.30 × 4 =
  16. 16.12 × 8 =
  17. 17.35 × 4 =
  18. 18.35 × 4 =
  19. 19.14 × 8 =
  20. 20.38 × 8 =
  21. 21.56 × 4 =
  22. 22.108 × 4 =
  23. 23.61 × 8 =
  24. 24.105 × 4 =
  25. 25.121 × 4 =
  26. 26.38 × 4 =
  27. 27.48 × 8 =
  28. 28.57 × 4 =
  29. 29.12 × 8 =
  30. 30.34 × 8 =
  31. 31.73 × 8 =
  32. 32.94 × 4 =
  33. 33.75 × 8 =
  34. 34.41 × 4 =
  35. 35.128 × 4 =
  36. 36.120 × 4 =
  37. 37.24 × 8 =
  38. 38.88 × 4 =
  39. 39.147 × 4 =
  40. 40.98 × 4 =

Answer key

  1. 152
  2. 272
  3. 304
  4. 256
  5. 608
  6. 568
  7. 488
  8. 132
  9. 224
  10. 480
  11. 228
  12. 380
  13. 560
  14. 416
  15. 120
  16. 96
  17. 140
  18. 140
  19. 112
  20. 304
  21. 224
  22. 432
  23. 488
  24. 420
  25. 484
  26. 152
  27. 384
  28. 228
  29. 96
  30. 272
  31. 584
  32. 376
  33. 600
  34. 164
  35. 512
  36. 480
  37. 192
  38. 352
  39. 588
  40. 392

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