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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 927 · 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. 1.49 × 4 =
  2. 2.86 × 4 =
  3. 3.150 × 4 =
  4. 4.90 × 4 =
  5. 5.36 × 4 =
  6. 6.105 × 4 =
  7. 7.36 × 8 =
  8. 8.53 × 4 =
  9. 9.33 × 8 =
  10. 10.22 × 8 =
  11. 11.114 × 4 =
  12. 12.32 × 8 =
  13. 13.29 × 4 =
  14. 14.78 × 4 =
  15. 15.30 × 8 =
  16. 16.29 × 8 =
  17. 17.143 × 4 =
  18. 18.114 × 4 =
  19. 19.155 × 4 =
  20. 20.76 × 4 =
  21. 21.47 × 8 =
  22. 22.15 × 4 =
  23. 23.33 × 8 =
  24. 24.17 × 8 =
  25. 25.29 × 8 =
  26. 26.24 × 8 =
  27. 27.55 × 8 =
  28. 28.54 × 4 =
  29. 29.25 × 4 =
  30. 30.67 × 8 =
  31. 31.81 × 4 =
  32. 32.37 × 8 =
  33. 33.14 × 8 =
  34. 34.56 × 4 =
  35. 35.93 × 4 =
  36. 36.62 × 8 =
  37. 37.147 × 4 =
  38. 38.89 × 4 =
  39. 39.18 × 8 =
  40. 40.48 × 8 =

Answer key

  1. 196
  2. 344
  3. 600
  4. 360
  5. 144
  6. 420
  7. 288
  8. 212
  9. 264
  10. 176
  11. 456
  12. 256
  13. 116
  14. 312
  15. 240
  16. 232
  17. 572
  18. 456
  19. 620
  20. 304
  21. 376
  22. 60
  23. 264
  24. 136
  25. 232
  26. 192
  27. 440
  28. 216
  29. 100
  30. 536
  31. 324
  32. 296
  33. 112
  34. 224
  35. 372
  36. 496
  37. 588
  38. 356
  39. 144
  40. 384

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