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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 866 · 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. 1.47 × 8 =
  2. 2.60 × 4 =
  3. 3.73 × 8 =
  4. 4.153 × 4 =
  5. 5.38 × 8 =
  6. 6.22 × 4 =
  7. 7.47 × 8 =
  8. 8.134 × 4 =
  9. 9.43 × 8 =
  10. 10.24 × 8 =
  11. 11.30 × 8 =
  12. 12.12 × 8 =
  13. 13.51 × 8 =
  14. 14.12 × 8 =
  15. 15.28 × 8 =
  16. 16.39 × 8 =
  17. 17.32 × 8 =
  18. 18.135 × 4 =
  19. 19.15 × 4 =
  20. 20.98 × 4 =
  21. 21.66 × 8 =
  22. 22.51 × 8 =
  23. 23.19 × 4 =
  24. 24.25 × 8 =
  25. 25.53 × 4 =
  26. 26.40 × 8 =
  27. 27.21 × 8 =
  28. 28.126 × 4 =
  29. 29.107 × 4 =
  30. 30.37 × 4 =
  31. 31.39 × 8 =
  32. 32.28 × 4 =
  33. 33.52 × 8 =
  34. 34.14 × 8 =
  35. 35.21 × 4 =
  36. 36.43 × 8 =
  37. 37.83 × 4 =
  38. 38.14 × 8 =
  39. 39.23 × 8 =
  40. 40.45 × 8 =

Answer key

  1. 376
  2. 240
  3. 584
  4. 612
  5. 304
  6. 88
  7. 376
  8. 536
  9. 344
  10. 192
  11. 240
  12. 96
  13. 408
  14. 96
  15. 224
  16. 312
  17. 256
  18. 540
  19. 60
  20. 392
  21. 528
  22. 408
  23. 76
  24. 200
  25. 212
  26. 320
  27. 168
  28. 504
  29. 428
  30. 148
  31. 312
  32. 112
  33. 416
  34. 112
  35. 84
  36. 344
  37. 332
  38. 112
  39. 184
  40. 360

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