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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 531 · 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. 1.69 × 8 =
  2. 2.136 × 4 =
  3. 3.51 × 8 =
  4. 4.158 × 4 =
  5. 5.34 × 4 =
  6. 6.66 × 8 =
  7. 7.89 × 4 =
  8. 8.41 × 8 =
  9. 9.31 × 4 =
  10. 10.54 × 8 =
  11. 11.58 × 8 =
  12. 12.33 × 4 =
  13. 13.91 × 4 =
  14. 14.88 × 4 =
  15. 15.147 × 4 =
  16. 16.113 × 4 =
  17. 17.18 × 4 =
  18. 18.20 × 4 =
  19. 19.41 × 8 =
  20. 20.59 × 4 =
  21. 21.52 × 8 =
  22. 22.75 × 8 =
  23. 23.55 × 8 =
  24. 24.109 × 4 =
  25. 25.25 × 4 =
  26. 26.94 × 4 =
  27. 27.45 × 8 =
  28. 28.12 × 8 =
  29. 29.27 × 8 =
  30. 30.37 × 8 =
  31. 31.70 × 4 =
  32. 32.35 × 8 =
  33. 33.34 × 8 =
  34. 34.65 × 8 =
  35. 35.64 × 8 =
  36. 36.75 × 8 =
  37. 37.26 × 8 =
  38. 38.77 × 4 =
  39. 39.62 × 8 =
  40. 40.82 × 4 =

Answer key

  1. 552
  2. 544
  3. 408
  4. 632
  5. 136
  6. 528
  7. 356
  8. 328
  9. 124
  10. 432
  11. 464
  12. 132
  13. 364
  14. 352
  15. 588
  16. 452
  17. 72
  18. 80
  19. 328
  20. 236
  21. 416
  22. 600
  23. 440
  24. 436
  25. 100
  26. 376
  27. 360
  28. 96
  29. 216
  30. 296
  31. 280
  32. 280
  33. 272
  34. 520
  35. 512
  36. 600
  37. 208
  38. 308
  39. 496
  40. 328

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