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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 605 · 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. 1.44 × 8 =
  2. 2.28 × 4 =
  3. 3.103 × 4 =
  4. 4.53 × 8 =
  5. 5.41 × 8 =
  6. 6.63 × 8 =
  7. 7.50 × 8 =
  8. 8.64 × 4 =
  9. 9.27 × 4 =
  10. 10.154 × 4 =
  11. 11.39 × 8 =
  12. 12.39 × 4 =
  13. 13.34 × 8 =
  14. 14.37 × 8 =
  15. 15.116 × 4 =
  16. 16.69 × 4 =
  17. 17.105 × 4 =
  18. 18.56 × 8 =
  19. 19.23 × 8 =
  20. 20.59 × 8 =
  21. 21.38 × 8 =
  22. 22.48 × 4 =
  23. 23.62 × 8 =
  24. 24.29 × 8 =
  25. 25.25 × 8 =
  26. 26.129 × 4 =
  27. 27.40 × 8 =
  28. 28.39 × 8 =
  29. 29.67 × 8 =
  30. 30.149 × 4 =
  31. 31.60 × 8 =
  32. 32.114 × 4 =
  33. 33.58 × 8 =
  34. 34.109 × 4 =
  35. 35.26 × 4 =
  36. 36.157 × 4 =
  37. 37.108 × 4 =
  38. 38.41 × 8 =
  39. 39.15 × 4 =
  40. 40.55 × 8 =

Answer key

  1. 352
  2. 112
  3. 412
  4. 424
  5. 328
  6. 504
  7. 400
  8. 256
  9. 108
  10. 616
  11. 312
  12. 156
  13. 272
  14. 296
  15. 464
  16. 276
  17. 420
  18. 448
  19. 184
  20. 472
  21. 304
  22. 192
  23. 496
  24. 232
  25. 200
  26. 516
  27. 320
  28. 312
  29. 536
  30. 596
  31. 480
  32. 456
  33. 464
  34. 436
  35. 104
  36. 628
  37. 432
  38. 328
  39. 60
  40. 440

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