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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 687 · 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. 1.42 × 4 =
  2. 2.66 × 4 =
  3. 3.49 × 4 =
  4. 4.136 × 4 =
  5. 5.73 × 8 =
  6. 6.122 × 4 =
  7. 7.49 × 8 =
  8. 8.58 × 8 =
  9. 9.91 × 4 =
  10. 10.160 × 4 =
  11. 11.59 × 4 =
  12. 12.34 × 8 =
  13. 13.78 × 4 =
  14. 14.16 × 8 =
  15. 15.150 × 4 =
  16. 16.34 × 4 =
  17. 17.44 × 8 =
  18. 18.32 × 4 =
  19. 19.26 × 8 =
  20. 20.44 × 8 =
  21. 21.31 × 4 =
  22. 22.45 × 8 =
  23. 23.29 × 4 =
  24. 24.37 × 4 =
  25. 25.36 × 8 =
  26. 26.24 × 8 =
  27. 27.39 × 4 =
  28. 28.159 × 4 =
  29. 29.25 × 8 =
  30. 30.48 × 8 =
  31. 31.86 × 4 =
  32. 32.35 × 8 =
  33. 33.40 × 4 =
  34. 34.39 × 8 =
  35. 35.78 × 4 =
  36. 36.39 × 4 =
  37. 37.62 × 4 =
  38. 38.142 × 4 =
  39. 39.24 × 8 =
  40. 40.104 × 4 =

Answer key

  1. 168
  2. 264
  3. 196
  4. 544
  5. 584
  6. 488
  7. 392
  8. 464
  9. 364
  10. 640
  11. 236
  12. 272
  13. 312
  14. 128
  15. 600
  16. 136
  17. 352
  18. 128
  19. 208
  20. 352
  21. 124
  22. 360
  23. 116
  24. 148
  25. 288
  26. 192
  27. 156
  28. 636
  29. 200
  30. 384
  31. 344
  32. 280
  33. 160
  34. 312
  35. 312
  36. 156
  37. 248
  38. 568
  39. 192
  40. 416

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