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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 2 · 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. 1.38 × 8 =
  2. 2.13 × 8 =
  3. 3.101 × 4 =
  4. 4.28 × 4 =
  5. 5.19 × 8 =
  6. 6.34 × 4 =
  7. 7.72 × 8 =
  8. 8.47 × 8 =
  9. 9.52 × 8 =
  10. 10.116 × 4 =
  11. 11.92 × 4 =
  12. 12.55 × 8 =
  13. 13.105 × 4 =
  14. 14.42 × 4 =
  15. 15.36 × 4 =
  16. 16.38 × 8 =
  17. 17.90 × 4 =
  18. 18.124 × 4 =
  19. 19.74 × 4 =
  20. 20.42 × 8 =
  21. 21.93 × 4 =
  22. 22.20 × 8 =
  23. 23.54 × 4 =
  24. 24.108 × 4 =
  25. 25.71 × 8 =
  26. 26.127 × 4 =
  27. 27.92 × 4 =
  28. 28.34 × 8 =
  29. 29.37 × 8 =
  30. 30.66 × 8 =
  31. 31.41 × 8 =
  32. 32.50 × 8 =
  33. 33.32 × 8 =
  34. 34.39 × 4 =
  35. 35.36 × 4 =
  36. 36.33 × 4 =
  37. 37.136 × 4 =
  38. 38.71 × 8 =
  39. 39.100 × 4 =
  40. 40.27 × 4 =

Answer key

  1. 304
  2. 104
  3. 404
  4. 112
  5. 152
  6. 136
  7. 576
  8. 376
  9. 416
  10. 464
  11. 368
  12. 440
  13. 420
  14. 168
  15. 144
  16. 304
  17. 360
  18. 496
  19. 296
  20. 336
  21. 372
  22. 160
  23. 216
  24. 432
  25. 568
  26. 508
  27. 368
  28. 272
  29. 296
  30. 528
  31. 328
  32. 400
  33. 256
  34. 156
  35. 144
  36. 132
  37. 544
  38. 568
  39. 400
  40. 108

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