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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 204 · 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. 1.98 × 4 =
  2. 2.152 × 4 =
  3. 3.36 × 8 =
  4. 4.51 × 8 =
  5. 5.24 × 8 =
  6. 6.66 × 8 =
  7. 7.105 × 4 =
  8. 8.36 × 8 =
  9. 9.19 × 8 =
  10. 10.15 × 8 =
  11. 11.51 × 8 =
  12. 12.152 × 4 =
  13. 13.14 × 8 =
  14. 14.42 × 4 =
  15. 15.52 × 4 =
  16. 16.12 × 8 =
  17. 17.58 × 8 =
  18. 18.37 × 4 =
  19. 19.25 × 4 =
  20. 20.101 × 4 =
  21. 21.18 × 4 =
  22. 22.91 × 4 =
  23. 23.160 × 4 =
  24. 24.19 × 8 =
  25. 25.69 × 8 =
  26. 26.156 × 4 =
  27. 27.14 × 4 =
  28. 28.70 × 8 =
  29. 29.39 × 8 =
  30. 30.43 × 8 =
  31. 31.20 × 4 =
  32. 32.97 × 4 =
  33. 33.31 × 8 =
  34. 34.12 × 8 =
  35. 35.74 × 8 =
  36. 36.110 × 4 =
  37. 37.19 × 4 =
  38. 38.116 × 4 =
  39. 39.50 × 8 =
  40. 40.131 × 4 =

Answer key

  1. 392
  2. 608
  3. 288
  4. 408
  5. 192
  6. 528
  7. 420
  8. 288
  9. 152
  10. 120
  11. 408
  12. 608
  13. 112
  14. 168
  15. 208
  16. 96
  17. 464
  18. 148
  19. 100
  20. 404
  21. 72
  22. 364
  23. 640
  24. 152
  25. 552
  26. 624
  27. 56
  28. 560
  29. 312
  30. 344
  31. 80
  32. 388
  33. 248
  34. 96
  35. 592
  36. 440
  37. 76
  38. 464
  39. 400
  40. 524

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