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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 284 · 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. 1.48 × 8 =
  2. 2.26 × 8 =
  3. 3.47 × 8 =
  4. 4.54 × 4 =
  5. 5.31 × 8 =
  6. 6.31 × 4 =
  7. 7.64 × 4 =
  8. 8.30 × 4 =
  9. 9.108 × 4 =
  10. 10.132 × 4 =
  11. 11.30 × 4 =
  12. 12.56 × 4 =
  13. 13.146 × 4 =
  14. 14.142 × 4 =
  15. 15.25 × 8 =
  16. 16.38 × 8 =
  17. 17.48 × 8 =
  18. 18.25 × 4 =
  19. 19.60 × 8 =
  20. 20.99 × 4 =
  21. 21.47 × 8 =
  22. 22.24 × 8 =
  23. 23.39 × 4 =
  24. 24.41 × 4 =
  25. 25.34 × 8 =
  26. 26.21 × 4 =
  27. 27.43 × 8 =
  28. 28.35 × 8 =
  29. 29.56 × 8 =
  30. 30.52 × 8 =
  31. 31.40 × 8 =
  32. 32.97 × 4 =
  33. 33.53 × 8 =
  34. 34.56 × 4 =
  35. 35.40 × 4 =
  36. 36.91 × 4 =
  37. 37.45 × 8 =
  38. 38.43 × 8 =
  39. 39.70 × 8 =
  40. 40.21 × 8 =

Answer key

  1. 384
  2. 208
  3. 376
  4. 216
  5. 248
  6. 124
  7. 256
  8. 120
  9. 432
  10. 528
  11. 120
  12. 224
  13. 584
  14. 568
  15. 200
  16. 304
  17. 384
  18. 100
  19. 480
  20. 396
  21. 376
  22. 192
  23. 156
  24. 164
  25. 272
  26. 84
  27. 344
  28. 280
  29. 448
  30. 416
  31. 320
  32. 388
  33. 424
  34. 224
  35. 160
  36. 364
  37. 360
  38. 344
  39. 560
  40. 168

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