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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 922 · 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. 1.69 × 8 =
  2. 2.69 × 4 =
  3. 3.68 × 8 =
  4. 4.63 × 8 =
  5. 5.75 × 8 =
  6. 6.98 × 4 =
  7. 7.95 × 4 =
  8. 8.24 × 8 =
  9. 9.44 × 8 =
  10. 10.12 × 8 =
  11. 11.37 × 8 =
  12. 12.42 × 8 =
  13. 13.65 × 8 =
  14. 14.71 × 4 =
  15. 15.78 × 4 =
  16. 16.21 × 4 =
  17. 17.26 × 8 =
  18. 18.23 × 8 =
  19. 19.45 × 8 =
  20. 20.62 × 8 =
  21. 21.69 × 8 =
  22. 22.95 × 4 =
  23. 23.19 × 8 =
  24. 24.74 × 4 =
  25. 25.39 × 8 =
  26. 26.18 × 8 =
  27. 27.15 × 4 =
  28. 28.64 × 4 =
  29. 29.14 × 8 =
  30. 30.150 × 4 =
  31. 31.29 × 8 =
  32. 32.48 × 8 =
  33. 33.54 × 8 =
  34. 34.67 × 8 =
  35. 35.30 × 4 =
  36. 36.156 × 4 =
  37. 37.22 × 8 =
  38. 38.51 × 8 =
  39. 39.37 × 8 =
  40. 40.93 × 4 =

Answer key

  1. 552
  2. 276
  3. 544
  4. 504
  5. 600
  6. 392
  7. 380
  8. 192
  9. 352
  10. 96
  11. 296
  12. 336
  13. 520
  14. 284
  15. 312
  16. 84
  17. 208
  18. 184
  19. 360
  20. 496
  21. 552
  22. 380
  23. 152
  24. 296
  25. 312
  26. 144
  27. 60
  28. 256
  29. 112
  30. 600
  31. 232
  32. 384
  33. 432
  34. 536
  35. 120
  36. 624
  37. 176
  38. 408
  39. 296
  40. 372

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