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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 857 · 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. 1.141 × 4 =
  2. 2.23 × 4 =
  3. 3.13 × 8 =
  4. 4.66 × 8 =
  5. 5.142 × 4 =
  6. 6.17 × 8 =
  7. 7.127 × 4 =
  8. 8.45 × 8 =
  9. 9.44 × 8 =
  10. 10.40 × 4 =
  11. 11.38 × 8 =
  12. 12.73 × 4 =
  13. 13.156 × 4 =
  14. 14.160 × 4 =
  15. 15.154 × 4 =
  16. 16.27 × 8 =
  17. 17.148 × 4 =
  18. 18.55 × 8 =
  19. 19.48 × 4 =
  20. 20.148 × 4 =
  21. 21.31 × 8 =
  22. 22.33 × 8 =
  23. 23.61 × 8 =
  24. 24.24 × 8 =
  25. 25.134 × 4 =
  26. 26.62 × 8 =
  27. 27.94 × 4 =
  28. 28.13 × 8 =
  29. 29.26 × 8 =
  30. 30.55 × 8 =
  31. 31.61 × 4 =
  32. 32.55 × 8 =
  33. 33.92 × 4 =
  34. 34.18 × 4 =
  35. 35.54 × 4 =
  36. 36.27 × 8 =
  37. 37.97 × 4 =
  38. 38.27 × 8 =
  39. 39.64 × 8 =
  40. 40.38 × 4 =

Answer key

  1. 564
  2. 92
  3. 104
  4. 528
  5. 568
  6. 136
  7. 508
  8. 360
  9. 352
  10. 160
  11. 304
  12. 292
  13. 624
  14. 640
  15. 616
  16. 216
  17. 592
  18. 440
  19. 192
  20. 592
  21. 248
  22. 264
  23. 488
  24. 192
  25. 536
  26. 496
  27. 376
  28. 104
  29. 208
  30. 440
  31. 244
  32. 440
  33. 368
  34. 72
  35. 216
  36. 216
  37. 388
  38. 216
  39. 512
  40. 152

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