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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 327 · 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. 1.59 × 8 =
  2. 2.27 × 8 =
  3. 3.16 × 8 =
  4. 4.78 × 4 =
  5. 5.33 × 4 =
  6. 6.72 × 8 =
  7. 7.46 × 8 =
  8. 8.35 × 4 =
  9. 9.54 × 8 =
  10. 10.49 × 8 =
  11. 11.56 × 8 =
  12. 12.26 × 8 =
  13. 13.151 × 4 =
  14. 14.43 × 4 =
  15. 15.45 × 4 =
  16. 16.94 × 4 =
  17. 17.35 × 8 =
  18. 18.54 × 8 =
  19. 19.13 × 8 =
  20. 20.88 × 4 =
  21. 21.19 × 4 =
  22. 22.61 × 8 =
  23. 23.127 × 4 =
  24. 24.17 × 4 =
  25. 25.23 × 8 =
  26. 26.66 × 8 =
  27. 27.29 × 8 =
  28. 28.43 × 8 =
  29. 29.35 × 8 =
  30. 30.84 × 4 =
  31. 31.156 × 4 =
  32. 32.40 × 4 =
  33. 33.151 × 4 =
  34. 34.29 × 8 =
  35. 35.65 × 4 =
  36. 36.37 × 8 =
  37. 37.49 × 8 =
  38. 38.131 × 4 =
  39. 39.30 × 4 =
  40. 40.159 × 4 =

Answer key

  1. 472
  2. 216
  3. 128
  4. 312
  5. 132
  6. 576
  7. 368
  8. 140
  9. 432
  10. 392
  11. 448
  12. 208
  13. 604
  14. 172
  15. 180
  16. 376
  17. 280
  18. 432
  19. 104
  20. 352
  21. 76
  22. 488
  23. 508
  24. 68
  25. 184
  26. 528
  27. 232
  28. 344
  29. 280
  30. 336
  31. 624
  32. 160
  33. 604
  34. 232
  35. 260
  36. 296
  37. 392
  38. 524
  39. 120
  40. 636

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