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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 250 · 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. 1.88 × 4 =
  2. 2.56 × 8 =
  3. 3.32 × 4 =
  4. 4.70 × 8 =
  5. 5.109 × 4 =
  6. 6.22 × 8 =
  7. 7.21 × 4 =
  8. 8.13 × 4 =
  9. 9.20 × 8 =
  10. 10.47 × 4 =
  11. 11.38 × 8 =
  12. 12.33 × 8 =
  13. 13.31 × 4 =
  14. 14.66 × 8 =
  15. 15.52 × 4 =
  16. 16.42 × 4 =
  17. 17.60 × 8 =
  18. 18.70 × 4 =
  19. 19.59 × 8 =
  20. 20.51 × 8 =
  21. 21.38 × 4 =
  22. 22.42 × 8 =
  23. 23.34 × 8 =
  24. 24.36 × 4 =
  25. 25.96 × 4 =
  26. 26.107 × 4 =
  27. 27.70 × 8 =
  28. 28.71 × 8 =
  29. 29.18 × 8 =
  30. 30.14 × 8 =
  31. 31.48 × 4 =
  32. 32.94 × 4 =
  33. 33.43 × 8 =
  34. 34.25 × 8 =
  35. 35.153 × 4 =
  36. 36.116 × 4 =
  37. 37.153 × 4 =
  38. 38.47 × 4 =
  39. 39.45 × 8 =
  40. 40.37 × 8 =

Answer key

  1. 352
  2. 448
  3. 128
  4. 560
  5. 436
  6. 176
  7. 84
  8. 52
  9. 160
  10. 188
  11. 304
  12. 264
  13. 124
  14. 528
  15. 208
  16. 168
  17. 480
  18. 280
  19. 472
  20. 408
  21. 152
  22. 336
  23. 272
  24. 144
  25. 384
  26. 428
  27. 560
  28. 568
  29. 144
  30. 112
  31. 192
  32. 376
  33. 344
  34. 200
  35. 612
  36. 464
  37. 612
  38. 188
  39. 360
  40. 296

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