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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 742 · 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. 3.29 × 8 =
  4. 4.54 × 8 =
  5. 5.13 × 8 =
  6. 6.20 × 4 =
  7. 7.54 × 8 =
  8. 8.33 × 4 =
  9. 9.66 × 8 =
  10. 10.65 × 4 =
  11. 11.134 × 4 =
  12. 12.127 × 4 =
  13. 13.53 × 8 =
  14. 14.95 × 4 =
  15. 15.132 × 4 =
  16. 16.54 × 8 =
  17. 17.20 × 4 =
  18. 18.22 × 8 =
  19. 19.13 × 4 =
  20. 20.108 × 4 =
  21. 21.39 × 8 =
  22. 22.68 × 8 =
  23. 23.54 × 8 =
  24. 24.108 × 4 =
  25. 25.25 × 8 =
  26. 26.109 × 4 =
  27. 27.68 × 4 =
  28. 28.73 × 8 =
  29. 29.158 × 4 =
  30. 30.60 × 8 =
  31. 31.150 × 4 =
  32. 32.123 × 4 =
  33. 33.119 × 4 =
  34. 34.18 × 4 =
  35. 35.29 × 8 =
  36. 36.43 × 4 =
  37. 37.92 × 4 =
  38. 38.54 × 8 =
  39. 39.134 × 4 =
  40. 40.65 × 8 =

Answer key

  1. 352
  2. 112
  3. 232
  4. 432
  5. 104
  6. 80
  7. 432
  8. 132
  9. 528
  10. 260
  11. 536
  12. 508
  13. 424
  14. 380
  15. 528
  16. 432
  17. 80
  18. 176
  19. 52
  20. 432
  21. 312
  22. 544
  23. 432
  24. 432
  25. 200
  26. 436
  27. 272
  28. 584
  29. 632
  30. 480
  31. 600
  32. 492
  33. 476
  34. 72
  35. 232
  36. 172
  37. 368
  38. 432
  39. 536
  40. 520

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