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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 183 · 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. 1.22 × 8 =
  2. 2.82 × 4 =
  3. 3.121 × 4 =
  4. 4.55 × 8 =
  5. 5.61 × 8 =
  6. 6.49 × 8 =
  7. 7.33 × 4 =
  8. 8.38 × 8 =
  9. 9.15 × 8 =
  10. 10.26 × 8 =
  11. 11.24 × 8 =
  12. 12.66 × 8 =
  13. 13.95 × 4 =
  14. 14.14 × 4 =
  15. 15.125 × 4 =
  16. 16.113 × 4 =
  17. 17.21 × 4 =
  18. 18.63 × 8 =
  19. 19.16 × 8 =
  20. 20.22 × 8 =
  21. 21.50 × 4 =
  22. 22.24 × 8 =
  23. 23.28 × 8 =
  24. 24.25 × 4 =
  25. 25.73 × 4 =
  26. 26.52 × 4 =
  27. 27.71 × 4 =
  28. 28.12 × 8 =
  29. 29.55 × 8 =
  30. 30.68 × 8 =
  31. 31.89 × 4 =
  32. 32.42 × 8 =
  33. 33.16 × 4 =
  34. 34.28 × 8 =
  35. 35.72 × 8 =
  36. 36.16 × 4 =
  37. 37.64 × 8 =
  38. 38.46 × 4 =
  39. 39.20 × 8 =
  40. 40.16 × 8 =

Answer key

  1. 176
  2. 328
  3. 484
  4. 440
  5. 488
  6. 392
  7. 132
  8. 304
  9. 120
  10. 208
  11. 192
  12. 528
  13. 380
  14. 56
  15. 500
  16. 452
  17. 84
  18. 504
  19. 128
  20. 176
  21. 200
  22. 192
  23. 224
  24. 100
  25. 292
  26. 208
  27. 284
  28. 96
  29. 440
  30. 544
  31. 356
  32. 336
  33. 64
  34. 224
  35. 576
  36. 64
  37. 512
  38. 184
  39. 160
  40. 128

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