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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 481 · 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. 1.64 × 4 =
  2. 2.22 × 8 =
  3. 3.19 × 8 =
  4. 4.43 × 4 =
  5. 5.83 × 4 =
  6. 6.102 × 4 =
  7. 7.16 × 4 =
  8. 8.26 × 8 =
  9. 9.64 × 8 =
  10. 10.62 × 8 =
  11. 11.14 × 4 =
  12. 12.51 × 4 =
  13. 13.70 × 8 =
  14. 14.89 × 4 =
  15. 15.49 × 4 =
  16. 16.29 × 8 =
  17. 17.137 × 4 =
  18. 18.114 × 4 =
  19. 19.24 × 4 =
  20. 20.48 × 4 =
  21. 21.26 × 8 =
  22. 22.67 × 8 =
  23. 23.40 × 4 =
  24. 24.88 × 4 =
  25. 25.43 × 8 =
  26. 26.13 × 8 =
  27. 27.12 × 8 =
  28. 28.46 × 4 =
  29. 29.45 × 4 =
  30. 30.42 × 8 =
  31. 31.13 × 8 =
  32. 32.83 × 4 =
  33. 33.30 × 4 =
  34. 34.41 × 4 =
  35. 35.132 × 4 =
  36. 36.27 × 8 =
  37. 37.121 × 4 =
  38. 38.33 × 4 =
  39. 39.34 × 8 =
  40. 40.63 × 8 =

Answer key

  1. 256
  2. 176
  3. 152
  4. 172
  5. 332
  6. 408
  7. 64
  8. 208
  9. 512
  10. 496
  11. 56
  12. 204
  13. 560
  14. 356
  15. 196
  16. 232
  17. 548
  18. 456
  19. 96
  20. 192
  21. 208
  22. 536
  23. 160
  24. 352
  25. 344
  26. 104
  27. 96
  28. 184
  29. 180
  30. 336
  31. 104
  32. 332
  33. 120
  34. 164
  35. 528
  36. 216
  37. 484
  38. 132
  39. 272
  40. 504

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