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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 649 · 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. 1.38 × 8 =
  2. 2.72 × 8 =
  3. 3.73 × 8 =
  4. 4.13 × 8 =
  5. 5.119 × 4 =
  6. 6.23 × 8 =
  7. 7.75 × 8 =
  8. 8.18 × 8 =
  9. 9.61 × 8 =
  10. 10.131 × 4 =
  11. 11.26 × 8 =
  12. 12.40 × 8 =
  13. 13.48 × 8 =
  14. 14.117 × 4 =
  15. 15.84 × 4 =
  16. 16.68 × 8 =
  17. 17.28 × 8 =
  18. 18.12 × 8 =
  19. 19.45 × 4 =
  20. 20.151 × 4 =
  21. 21.34 × 8 =
  22. 22.45 × 4 =
  23. 23.45 × 8 =
  24. 24.27 × 4 =
  25. 25.48 × 4 =
  26. 26.13 × 8 =
  27. 27.72 × 4 =
  28. 28.45 × 8 =
  29. 29.79 × 4 =
  30. 30.26 × 8 =
  31. 31.56 × 4 =
  32. 32.68 × 8 =
  33. 33.20 × 4 =
  34. 34.81 × 4 =
  35. 35.60 × 4 =
  36. 36.27 × 4 =
  37. 37.68 × 8 =
  38. 38.28 × 4 =
  39. 39.13 × 8 =
  40. 40.62 × 8 =

Answer key

  1. 304
  2. 576
  3. 584
  4. 104
  5. 476
  6. 184
  7. 600
  8. 144
  9. 488
  10. 524
  11. 208
  12. 320
  13. 384
  14. 468
  15. 336
  16. 544
  17. 224
  18. 96
  19. 180
  20. 604
  21. 272
  22. 180
  23. 360
  24. 108
  25. 192
  26. 104
  27. 288
  28. 360
  29. 316
  30. 208
  31. 224
  32. 544
  33. 80
  34. 324
  35. 240
  36. 108
  37. 544
  38. 112
  39. 104
  40. 496

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