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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 245 · 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. 1.16 × 4 =
  2. 2.68 × 8 =
  3. 3.104 × 4 =
  4. 4.156 × 4 =
  5. 5.121 × 4 =
  6. 6.141 × 4 =
  7. 7.66 × 4 =
  8. 8.144 × 4 =
  9. 9.135 × 4 =
  10. 10.71 × 4 =
  11. 11.69 × 8 =
  12. 12.29 × 8 =
  13. 13.100 × 4 =
  14. 14.22 × 8 =
  15. 15.34 × 4 =
  16. 16.45 × 8 =
  17. 17.62 × 4 =
  18. 18.21 × 8 =
  19. 19.48 × 8 =
  20. 20.44 × 8 =
  21. 21.69 × 8 =
  22. 22.121 × 4 =
  23. 23.14 × 8 =
  24. 24.87 × 4 =
  25. 25.14 × 4 =
  26. 26.109 × 4 =
  27. 27.52 × 8 =
  28. 28.70 × 4 =
  29. 29.69 × 8 =
  30. 30.64 × 8 =
  31. 31.44 × 4 =
  32. 32.153 × 4 =
  33. 33.90 × 4 =
  34. 34.18 × 8 =
  35. 35.31 × 8 =
  36. 36.72 × 8 =
  37. 37.101 × 4 =
  38. 38.22 × 8 =
  39. 39.14 × 4 =
  40. 40.55 × 8 =

Answer key

  1. 64
  2. 544
  3. 416
  4. 624
  5. 484
  6. 564
  7. 264
  8. 576
  9. 540
  10. 284
  11. 552
  12. 232
  13. 400
  14. 176
  15. 136
  16. 360
  17. 248
  18. 168
  19. 384
  20. 352
  21. 552
  22. 484
  23. 112
  24. 348
  25. 56
  26. 436
  27. 416
  28. 280
  29. 552
  30. 512
  31. 176
  32. 612
  33. 360
  34. 144
  35. 248
  36. 576
  37. 404
  38. 176
  39. 56
  40. 440

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