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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 266 · 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. 1.23 × 4 =
  2. 2.69 × 8 =
  3. 3.49 × 8 =
  4. 4.57 × 8 =
  5. 5.13 × 8 =
  6. 6.58 × 8 =
  7. 7.128 × 4 =
  8. 8.21 × 8 =
  9. 9.50 × 8 =
  10. 10.45 × 4 =
  11. 11.20 × 8 =
  12. 12.35 × 4 =
  13. 13.108 × 4 =
  14. 14.129 × 4 =
  15. 15.25 × 8 =
  16. 16.52 × 4 =
  17. 17.112 × 4 =
  18. 18.54 × 8 =
  19. 19.41 × 8 =
  20. 20.157 × 4 =
  21. 21.38 × 8 =
  22. 22.15 × 8 =
  23. 23.26 × 8 =
  24. 24.64 × 8 =
  25. 25.14 × 8 =
  26. 26.39 × 4 =
  27. 27.56 × 8 =
  28. 28.25 × 4 =
  29. 29.15 × 4 =
  30. 30.32 × 8 =
  31. 31.64 × 8 =
  32. 32.101 × 4 =
  33. 33.17 × 4 =
  34. 34.51 × 8 =
  35. 35.15 × 8 =
  36. 36.21 × 8 =
  37. 37.86 × 4 =
  38. 38.48 × 4 =
  39. 39.136 × 4 =
  40. 40.129 × 4 =

Answer key

  1. 92
  2. 552
  3. 392
  4. 456
  5. 104
  6. 464
  7. 512
  8. 168
  9. 400
  10. 180
  11. 160
  12. 140
  13. 432
  14. 516
  15. 200
  16. 208
  17. 448
  18. 432
  19. 328
  20. 628
  21. 304
  22. 120
  23. 208
  24. 512
  25. 112
  26. 156
  27. 448
  28. 100
  29. 60
  30. 256
  31. 512
  32. 404
  33. 68
  34. 408
  35. 120
  36. 168
  37. 344
  38. 192
  39. 544
  40. 516

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