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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 636 · 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. 1.139 × 4 =
  2. 2.46 × 8 =
  3. 3.31 × 8 =
  4. 4.27 × 8 =
  5. 5.43 × 4 =
  6. 6.101 × 4 =
  7. 7.36 × 4 =
  8. 8.121 × 4 =
  9. 9.115 × 4 =
  10. 10.26 × 8 =
  11. 11.73 × 8 =
  12. 12.151 × 4 =
  13. 13.116 × 4 =
  14. 14.150 × 4 =
  15. 15.44 × 8 =
  16. 16.17 × 4 =
  17. 17.64 × 8 =
  18. 18.14 × 8 =
  19. 19.66 × 4 =
  20. 20.49 × 8 =
  21. 21.92 × 4 =
  22. 22.86 × 4 =
  23. 23.16 × 8 =
  24. 24.32 × 8 =
  25. 25.59 × 8 =
  26. 26.70 × 8 =
  27. 27.141 × 4 =
  28. 28.129 × 4 =
  29. 29.27 × 4 =
  30. 30.59 × 8 =
  31. 31.58 × 4 =
  32. 32.26 × 4 =
  33. 33.24 × 4 =
  34. 34.63 × 4 =
  35. 35.71 × 8 =
  36. 36.17 × 8 =
  37. 37.17 × 8 =
  38. 38.25 × 8 =
  39. 39.52 × 8 =
  40. 40.69 × 4 =

Answer key

  1. 556
  2. 368
  3. 248
  4. 216
  5. 172
  6. 404
  7. 144
  8. 484
  9. 460
  10. 208
  11. 584
  12. 604
  13. 464
  14. 600
  15. 352
  16. 68
  17. 512
  18. 112
  19. 264
  20. 392
  21. 368
  22. 344
  23. 128
  24. 256
  25. 472
  26. 560
  27. 564
  28. 516
  29. 108
  30. 472
  31. 232
  32. 104
  33. 96
  34. 252
  35. 568
  36. 136
  37. 136
  38. 200
  39. 416
  40. 276

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