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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 603 · 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. 1.26 × 8 =
  2. 2.39 × 4 =
  3. 3.87 × 4 =
  4. 4.90 × 4 =
  5. 5.36 × 4 =
  6. 6.67 × 8 =
  7. 7.49 × 8 =
  8. 8.19 × 4 =
  9. 9.51 × 8 =
  10. 10.141 × 4 =
  11. 11.25 × 4 =
  12. 12.147 × 4 =
  13. 13.87 × 4 =
  14. 14.101 × 4 =
  15. 15.68 × 4 =
  16. 16.144 × 4 =
  17. 17.58 × 8 =
  18. 18.43 × 8 =
  19. 19.67 × 4 =
  20. 20.66 × 8 =
  21. 21.28 × 8 =
  22. 22.38 × 8 =
  23. 23.113 × 4 =
  24. 24.31 × 8 =
  25. 25.140 × 4 =
  26. 26.70 × 8 =
  27. 27.17 × 8 =
  28. 28.52 × 4 =
  29. 29.37 × 8 =
  30. 30.43 × 8 =
  31. 31.104 × 4 =
  32. 32.39 × 8 =
  33. 33.15 × 8 =
  34. 34.15 × 8 =
  35. 35.20 × 8 =
  36. 36.45 × 4 =
  37. 37.69 × 8 =
  38. 38.19 × 8 =
  39. 39.147 × 4 =
  40. 40.130 × 4 =

Answer key

  1. 208
  2. 156
  3. 348
  4. 360
  5. 144
  6. 536
  7. 392
  8. 76
  9. 408
  10. 564
  11. 100
  12. 588
  13. 348
  14. 404
  15. 272
  16. 576
  17. 464
  18. 344
  19. 268
  20. 528
  21. 224
  22. 304
  23. 452
  24. 248
  25. 560
  26. 560
  27. 136
  28. 208
  29. 296
  30. 344
  31. 416
  32. 312
  33. 120
  34. 120
  35. 160
  36. 180
  37. 552
  38. 152
  39. 588
  40. 520

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