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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 545 · 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. 1.71 × 8 =
  2. 2.36 × 4 =
  3. 3.29 × 8 =
  4. 4.31 × 4 =
  5. 5.64 × 8 =
  6. 6.137 × 4 =
  7. 7.47 × 8 =
  8. 8.71 × 8 =
  9. 9.60 × 8 =
  10. 10.60 × 8 =
  11. 11.22 × 8 =
  12. 12.151 × 4 =
  13. 13.94 × 4 =
  14. 14.40 × 8 =
  15. 15.47 × 8 =
  16. 16.102 × 4 =
  17. 17.120 × 4 =
  18. 18.59 × 4 =
  19. 19.135 × 4 =
  20. 20.60 × 8 =
  21. 21.20 × 4 =
  22. 22.56 × 4 =
  23. 23.137 × 4 =
  24. 24.143 × 4 =
  25. 25.160 × 4 =
  26. 26.71 × 8 =
  27. 27.24 × 4 =
  28. 28.58 × 4 =
  29. 29.38 × 4 =
  30. 30.15 × 8 =
  31. 31.42 × 4 =
  32. 32.128 × 4 =
  33. 33.110 × 4 =
  34. 34.33 × 8 =
  35. 35.127 × 4 =
  36. 36.38 × 8 =
  37. 37.116 × 4 =
  38. 38.136 × 4 =
  39. 39.58 × 4 =
  40. 40.24 × 4 =

Answer key

  1. 568
  2. 144
  3. 232
  4. 124
  5. 512
  6. 548
  7. 376
  8. 568
  9. 480
  10. 480
  11. 176
  12. 604
  13. 376
  14. 320
  15. 376
  16. 408
  17. 480
  18. 236
  19. 540
  20. 480
  21. 80
  22. 224
  23. 548
  24. 572
  25. 640
  26. 568
  27. 96
  28. 232
  29. 152
  30. 120
  31. 168
  32. 512
  33. 440
  34. 264
  35. 508
  36. 304
  37. 464
  38. 544
  39. 232
  40. 96

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