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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 387 · 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. 1.12 × 8 =
  2. 2.91 × 4 =
  3. 3.99 × 4 =
  4. 4.140 × 4 =
  5. 5.40 × 8 =
  6. 6.39 × 4 =
  7. 7.56 × 8 =
  8. 8.154 × 4 =
  9. 9.108 × 4 =
  10. 10.58 × 8 =
  11. 11.15 × 8 =
  12. 12.155 × 4 =
  13. 13.104 × 4 =
  14. 14.66 × 4 =
  15. 15.121 × 4 =
  16. 16.49 × 8 =
  17. 17.47 × 8 =
  18. 18.37 × 8 =
  19. 19.26 × 8 =
  20. 20.52 × 8 =
  21. 21.104 × 4 =
  22. 22.28 × 8 =
  23. 23.22 × 4 =
  24. 24.12 × 8 =
  25. 25.132 × 4 =
  26. 26.27 × 4 =
  27. 27.158 × 4 =
  28. 28.52 × 4 =
  29. 29.85 × 4 =
  30. 30.13 × 4 =
  31. 31.58 × 8 =
  32. 32.46 × 8 =
  33. 33.121 × 4 =
  34. 34.49 × 8 =
  35. 35.37 × 8 =
  36. 36.47 × 8 =
  37. 37.24 × 4 =
  38. 38.145 × 4 =
  39. 39.17 × 8 =
  40. 40.35 × 8 =

Answer key

  1. 96
  2. 364
  3. 396
  4. 560
  5. 320
  6. 156
  7. 448
  8. 616
  9. 432
  10. 464
  11. 120
  12. 620
  13. 416
  14. 264
  15. 484
  16. 392
  17. 376
  18. 296
  19. 208
  20. 416
  21. 416
  22. 224
  23. 88
  24. 96
  25. 528
  26. 108
  27. 632
  28. 208
  29. 340
  30. 52
  31. 464
  32. 368
  33. 484
  34. 392
  35. 296
  36. 376
  37. 96
  38. 580
  39. 136
  40. 280

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