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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 376 · 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. 1.14 × 4 =
  2. 2.26 × 8 =
  3. 3.58 × 4 =
  4. 4.27 × 8 =
  5. 5.34 × 4 =
  6. 6.41 × 4 =
  7. 7.37 × 4 =
  8. 8.40 × 8 =
  9. 9.60 × 8 =
  10. 10.23 × 8 =
  11. 11.41 × 8 =
  12. 12.62 × 8 =
  13. 13.38 × 8 =
  14. 14.142 × 4 =
  15. 15.13 × 4 =
  16. 16.69 × 4 =
  17. 17.58 × 4 =
  18. 18.40 × 8 =
  19. 19.78 × 4 =
  20. 20.47 × 8 =
  21. 21.18 × 8 =
  22. 22.19 × 4 =
  23. 23.115 × 4 =
  24. 24.13 × 8 =
  25. 25.25 × 8 =
  26. 26.22 × 8 =
  27. 27.126 × 4 =
  28. 28.36 × 8 =
  29. 29.34 × 8 =
  30. 30.40 × 8 =
  31. 31.26 × 4 =
  32. 32.58 × 8 =
  33. 33.66 × 8 =
  34. 34.127 × 4 =
  35. 35.47 × 8 =
  36. 36.96 × 4 =
  37. 37.108 × 4 =
  38. 38.83 × 4 =
  39. 39.37 × 4 =
  40. 40.28 × 4 =

Answer key

  1. 56
  2. 208
  3. 232
  4. 216
  5. 136
  6. 164
  7. 148
  8. 320
  9. 480
  10. 184
  11. 328
  12. 496
  13. 304
  14. 568
  15. 52
  16. 276
  17. 232
  18. 320
  19. 312
  20. 376
  21. 144
  22. 76
  23. 460
  24. 104
  25. 200
  26. 176
  27. 504
  28. 288
  29. 272
  30. 320
  31. 104
  32. 464
  33. 528
  34. 508
  35. 376
  36. 384
  37. 432
  38. 332
  39. 148
  40. 112

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