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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 844 · 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. 1.156 × 4 =
  2. 2.20 × 8 =
  3. 3.129 × 4 =
  4. 4.121 × 4 =
  5. 5.132 × 4 =
  6. 6.17 × 8 =
  7. 7.147 × 4 =
  8. 8.42 × 4 =
  9. 9.12 × 8 =
  10. 10.27 × 8 =
  11. 11.36 × 4 =
  12. 12.134 × 4 =
  13. 13.44 × 4 =
  14. 14.28 × 4 =
  15. 15.153 × 4 =
  16. 16.119 × 4 =
  17. 17.48 × 8 =
  18. 18.35 × 8 =
  19. 19.131 × 4 =
  20. 20.49 × 4 =
  21. 21.44 × 4 =
  22. 22.68 × 8 =
  23. 23.25 × 4 =
  24. 24.105 × 4 =
  25. 25.78 × 4 =
  26. 26.70 × 8 =
  27. 27.58 × 4 =
  28. 28.99 × 4 =
  29. 29.33 × 8 =
  30. 30.45 × 8 =
  31. 31.96 × 4 =
  32. 32.24 × 8 =
  33. 33.38 × 4 =
  34. 34.36 × 4 =
  35. 35.121 × 4 =
  36. 36.22 × 4 =
  37. 37.18 × 4 =
  38. 38.49 × 4 =
  39. 39.19 × 4 =
  40. 40.96 × 4 =

Answer key

  1. 624
  2. 160
  3. 516
  4. 484
  5. 528
  6. 136
  7. 588
  8. 168
  9. 96
  10. 216
  11. 144
  12. 536
  13. 176
  14. 112
  15. 612
  16. 476
  17. 384
  18. 280
  19. 524
  20. 196
  21. 176
  22. 544
  23. 100
  24. 420
  25. 312
  26. 560
  27. 232
  28. 396
  29. 264
  30. 360
  31. 384
  32. 192
  33. 152
  34. 144
  35. 484
  36. 88
  37. 72
  38. 196
  39. 76
  40. 384

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