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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 335 · 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. 2.54 × 8 =
  3. 3.32 × 8 =
  4. 4.88 × 4 =
  5. 5.38 × 4 =
  6. 6.49 × 8 =
  7. 7.46 × 8 =
  8. 8.32 × 8 =
  9. 9.72 × 8 =
  10. 10.141 × 4 =
  11. 11.20 × 8 =
  12. 12.41 × 8 =
  13. 13.44 × 8 =
  14. 14.72 × 8 =
  15. 15.118 × 4 =
  16. 16.46 × 4 =
  17. 17.44 × 8 =
  18. 18.96 × 4 =
  19. 19.21 × 4 =
  20. 20.40 × 4 =
  21. 21.32 × 8 =
  22. 22.122 × 4 =
  23. 23.30 × 8 =
  24. 24.38 × 4 =
  25. 25.26 × 8 =
  26. 26.50 × 8 =
  27. 27.19 × 4 =
  28. 28.74 × 8 =
  29. 29.82 × 4 =
  30. 30.132 × 4 =
  31. 31.39 × 8 =
  32. 32.26 × 8 =
  33. 33.36 × 4 =
  34. 34.23 × 4 =
  35. 35.35 × 4 =
  36. 36.159 × 4 =
  37. 37.35 × 4 =
  38. 38.23 × 8 =
  39. 39.69 × 8 =
  40. 40.41 × 8 =

Answer key

  1. 304
  2. 432
  3. 256
  4. 352
  5. 152
  6. 392
  7. 368
  8. 256
  9. 576
  10. 564
  11. 160
  12. 328
  13. 352
  14. 576
  15. 472
  16. 184
  17. 352
  18. 384
  19. 84
  20. 160
  21. 256
  22. 488
  23. 240
  24. 152
  25. 208
  26. 400
  27. 76
  28. 592
  29. 328
  30. 528
  31. 312
  32. 208
  33. 144
  34. 92
  35. 140
  36. 636
  37. 140
  38. 184
  39. 552
  40. 328

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