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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 666 · 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. 1.66 × 4 =
  2. 2.76 × 4 =
  3. 3.48 × 4 =
  4. 4.49 × 4 =
  5. 5.144 × 4 =
  6. 6.158 × 4 =
  7. 7.49 × 8 =
  8. 8.17 × 8 =
  9. 9.43 × 4 =
  10. 10.37 × 8 =
  11. 11.155 × 4 =
  12. 12.49 × 8 =
  13. 13.32 × 4 =
  14. 14.121 × 4 =
  15. 15.72 × 8 =
  16. 16.144 × 4 =
  17. 17.121 × 4 =
  18. 18.55 × 4 =
  19. 19.17 × 8 =
  20. 20.71 × 8 =
  21. 21.48 × 8 =
  22. 22.117 × 4 =
  23. 23.75 × 8 =
  24. 24.49 × 8 =
  25. 25.38 × 8 =
  26. 26.42 × 8 =
  27. 27.134 × 4 =
  28. 28.18 × 8 =
  29. 29.68 × 4 =
  30. 30.49 × 4 =
  31. 31.90 × 4 =
  32. 32.62 × 8 =
  33. 33.34 × 4 =
  34. 34.72 × 8 =
  35. 35.135 × 4 =
  36. 36.66 × 4 =
  37. 37.32 × 4 =
  38. 38.67 × 8 =
  39. 39.31 × 8 =
  40. 40.36 × 4 =

Answer key

  1. 264
  2. 304
  3. 192
  4. 196
  5. 576
  6. 632
  7. 392
  8. 136
  9. 172
  10. 296
  11. 620
  12. 392
  13. 128
  14. 484
  15. 576
  16. 576
  17. 484
  18. 220
  19. 136
  20. 568
  21. 384
  22. 468
  23. 600
  24. 392
  25. 304
  26. 336
  27. 536
  28. 144
  29. 272
  30. 196
  31. 360
  32. 496
  33. 136
  34. 576
  35. 540
  36. 264
  37. 128
  38. 536
  39. 248
  40. 144

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