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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 495 · 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. 1.25 × 4 =
  2. 2.33 × 4 =
  3. 3.22 × 4 =
  4. 4.74 × 8 =
  5. 5.29 × 8 =
  6. 6.72 × 8 =
  7. 7.97 × 4 =
  8. 8.29 × 8 =
  9. 9.24 × 8 =
  10. 10.121 × 4 =
  11. 11.74 × 4 =
  12. 12.44 × 8 =
  13. 13.128 × 4 =
  14. 14.29 × 4 =
  15. 15.13 × 8 =
  16. 16.44 × 4 =
  17. 17.58 × 8 =
  18. 18.35 × 8 =
  19. 19.111 × 4 =
  20. 20.33 × 4 =
  21. 21.69 × 8 =
  22. 22.13 × 8 =
  23. 23.135 × 4 =
  24. 24.66 × 4 =
  25. 25.40 × 8 =
  26. 26.70 × 8 =
  27. 27.35 × 8 =
  28. 28.28 × 4 =
  29. 29.50 × 8 =
  30. 30.40 × 8 =
  31. 31.36 × 4 =
  32. 32.73 × 8 =
  33. 33.63 × 8 =
  34. 34.13 × 8 =
  35. 35.14 × 8 =
  36. 36.20 × 4 =
  37. 37.99 × 4 =
  38. 38.53 × 8 =
  39. 39.55 × 8 =
  40. 40.20 × 8 =

Answer key

  1. 100
  2. 132
  3. 88
  4. 592
  5. 232
  6. 576
  7. 388
  8. 232
  9. 192
  10. 484
  11. 296
  12. 352
  13. 512
  14. 116
  15. 104
  16. 176
  17. 464
  18. 280
  19. 444
  20. 132
  21. 552
  22. 104
  23. 540
  24. 264
  25. 320
  26. 560
  27. 280
  28. 112
  29. 400
  30. 320
  31. 144
  32. 584
  33. 504
  34. 104
  35. 112
  36. 80
  37. 396
  38. 424
  39. 440
  40. 160

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