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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 194 · 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. 1.20 × 8 =
  2. 2.63 × 8 =
  3. 3.29 × 8 =
  4. 4.29 × 8 =
  5. 5.67 × 8 =
  6. 6.58 × 8 =
  7. 7.69 × 8 =
  8. 8.113 × 4 =
  9. 9.96 × 4 =
  10. 10.67 × 8 =
  11. 11.19 × 8 =
  12. 12.12 × 8 =
  13. 13.44 × 8 =
  14. 14.26 × 8 =
  15. 15.19 × 8 =
  16. 16.41 × 8 =
  17. 17.41 × 4 =
  18. 18.25 × 8 =
  19. 19.78 × 4 =
  20. 20.35 × 4 =
  21. 21.74 × 8 =
  22. 22.63 × 4 =
  23. 23.44 × 4 =
  24. 24.29 × 8 =
  25. 25.39 × 4 =
  26. 26.47 × 8 =
  27. 27.88 × 4 =
  28. 28.102 × 4 =
  29. 29.83 × 4 =
  30. 30.97 × 4 =
  31. 31.63 × 8 =
  32. 32.58 × 8 =
  33. 33.122 × 4 =
  34. 34.68 × 8 =
  35. 35.22 × 4 =
  36. 36.34 × 8 =
  37. 37.31 × 8 =
  38. 38.38 × 4 =
  39. 39.105 × 4 =
  40. 40.45 × 8 =

Answer key

  1. 160
  2. 504
  3. 232
  4. 232
  5. 536
  6. 464
  7. 552
  8. 452
  9. 384
  10. 536
  11. 152
  12. 96
  13. 352
  14. 208
  15. 152
  16. 328
  17. 164
  18. 200
  19. 312
  20. 140
  21. 592
  22. 252
  23. 176
  24. 232
  25. 156
  26. 376
  27. 352
  28. 408
  29. 332
  30. 388
  31. 504
  32. 464
  33. 488
  34. 544
  35. 88
  36. 272
  37. 248
  38. 152
  39. 420
  40. 360

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