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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 69 · 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. 1.39 × 4 =
  2. 2.73 × 4 =
  3. 3.157 × 4 =
  4. 4.21 × 8 =
  5. 5.56 × 8 =
  6. 6.142 × 4 =
  7. 7.47 × 4 =
  8. 8.58 × 8 =
  9. 9.144 × 4 =
  10. 10.156 × 4 =
  11. 11.49 × 4 =
  12. 12.156 × 4 =
  13. 13.146 × 4 =
  14. 14.26 × 8 =
  15. 15.21 × 8 =
  16. 16.72 × 8 =
  17. 17.54 × 8 =
  18. 18.19 × 8 =
  19. 19.18 × 8 =
  20. 20.105 × 4 =
  21. 21.72 × 8 =
  22. 22.91 × 4 =
  23. 23.27 × 8 =
  24. 24.110 × 4 =
  25. 25.96 × 4 =
  26. 26.60 × 4 =
  27. 27.70 × 8 =
  28. 28.99 × 4 =
  29. 29.18 × 4 =
  30. 30.135 × 4 =
  31. 31.86 × 4 =
  32. 32.68 × 8 =
  33. 33.54 × 4 =
  34. 34.30 × 8 =
  35. 35.26 × 4 =
  36. 36.21 × 8 =
  37. 37.71 × 8 =
  38. 38.86 × 4 =
  39. 39.101 × 4 =
  40. 40.54 × 8 =

Answer key

  1. 156
  2. 292
  3. 628
  4. 168
  5. 448
  6. 568
  7. 188
  8. 464
  9. 576
  10. 624
  11. 196
  12. 624
  13. 584
  14. 208
  15. 168
  16. 576
  17. 432
  18. 152
  19. 144
  20. 420
  21. 576
  22. 364
  23. 216
  24. 440
  25. 384
  26. 240
  27. 560
  28. 396
  29. 72
  30. 540
  31. 344
  32. 544
  33. 216
  34. 240
  35. 104
  36. 168
  37. 568
  38. 344
  39. 404
  40. 432

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