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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 986 · 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. 1.64 × 8 =
  2. 2.97 × 4 =
  3. 3.55 × 4 =
  4. 4.141 × 4 =
  5. 5.27 × 8 =
  6. 6.33 × 4 =
  7. 7.146 × 4 =
  8. 8.15 × 8 =
  9. 9.24 × 4 =
  10. 10.46 × 8 =
  11. 11.22 × 8 =
  12. 12.40 × 8 =
  13. 13.27 × 4 =
  14. 14.42 × 8 =
  15. 15.134 × 4 =
  16. 16.23 × 8 =
  17. 17.71 × 4 =
  18. 18.68 × 8 =
  19. 19.76 × 4 =
  20. 20.21 × 8 =
  21. 21.22 × 4 =
  22. 22.111 × 4 =
  23. 23.69 × 4 =
  24. 24.23 × 4 =
  25. 25.66 × 8 =
  26. 26.146 × 4 =
  27. 27.46 × 4 =
  28. 28.23 × 8 =
  29. 29.139 × 4 =
  30. 30.35 × 8 =
  31. 31.54 × 8 =
  32. 32.97 × 4 =
  33. 33.24 × 4 =
  34. 34.88 × 4 =
  35. 35.148 × 4 =
  36. 36.90 × 4 =
  37. 37.26 × 8 =
  38. 38.24 × 8 =
  39. 39.43 × 4 =
  40. 40.54 × 8 =

Answer key

  1. 512
  2. 388
  3. 220
  4. 564
  5. 216
  6. 132
  7. 584
  8. 120
  9. 96
  10. 368
  11. 176
  12. 320
  13. 108
  14. 336
  15. 536
  16. 184
  17. 284
  18. 544
  19. 304
  20. 168
  21. 88
  22. 444
  23. 276
  24. 92
  25. 528
  26. 584
  27. 184
  28. 184
  29. 556
  30. 280
  31. 432
  32. 388
  33. 96
  34. 352
  35. 592
  36. 360
  37. 208
  38. 192
  39. 172
  40. 432

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