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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 178 · 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. 1.66 × 8 =
  2. 2.27 × 4 =
  3. 3.29 × 4 =
  4. 4.115 × 4 =
  5. 5.45 × 8 =
  6. 6.30 × 4 =
  7. 7.58 × 8 =
  8. 8.35 × 8 =
  9. 9.110 × 4 =
  10. 10.45 × 4 =
  11. 11.32 × 8 =
  12. 12.31 × 8 =
  13. 13.16 × 8 =
  14. 14.137 × 4 =
  15. 15.13 × 8 =
  16. 16.33 × 4 =
  17. 17.152 × 4 =
  18. 18.17 × 4 =
  19. 19.63 × 4 =
  20. 20.25 × 8 =
  21. 21.36 × 8 =
  22. 22.32 × 4 =
  23. 23.62 × 8 =
  24. 24.40 × 8 =
  25. 25.119 × 4 =
  26. 26.19 × 4 =
  27. 27.17 × 4 =
  28. 28.96 × 4 =
  29. 29.40 × 4 =
  30. 30.32 × 8 =
  31. 31.26 × 8 =
  32. 32.142 × 4 =
  33. 33.39 × 8 =
  34. 34.59 × 8 =
  35. 35.99 × 4 =
  36. 36.73 × 4 =
  37. 37.78 × 4 =
  38. 38.13 × 8 =
  39. 39.24 × 4 =
  40. 40.31 × 8 =

Answer key

  1. 528
  2. 108
  3. 116
  4. 460
  5. 360
  6. 120
  7. 464
  8. 280
  9. 440
  10. 180
  11. 256
  12. 248
  13. 128
  14. 548
  15. 104
  16. 132
  17. 608
  18. 68
  19. 252
  20. 200
  21. 288
  22. 128
  23. 496
  24. 320
  25. 476
  26. 76
  27. 68
  28. 384
  29. 160
  30. 256
  31. 208
  32. 568
  33. 312
  34. 472
  35. 396
  36. 292
  37. 312
  38. 104
  39. 96
  40. 248

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