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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 676 · 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. 1.22 × 4 =
  2. 2.61 × 8 =
  3. 3.27 × 8 =
  4. 4.133 × 4 =
  5. 5.52 × 4 =
  6. 6.46 × 4 =
  7. 7.91 × 4 =
  8. 8.154 × 4 =
  9. 9.45 × 4 =
  10. 10.51 × 8 =
  11. 11.63 × 8 =
  12. 12.67 × 8 =
  13. 13.93 × 4 =
  14. 14.66 × 8 =
  15. 15.51 × 4 =
  16. 16.49 × 4 =
  17. 17.47 × 8 =
  18. 18.45 × 8 =
  19. 19.106 × 4 =
  20. 20.50 × 8 =
  21. 21.36 × 4 =
  22. 22.44 × 8 =
  23. 23.144 × 4 =
  24. 24.24 × 4 =
  25. 25.40 × 4 =
  26. 26.33 × 8 =
  27. 27.66 × 4 =
  28. 28.71 × 8 =
  29. 29.19 × 8 =
  30. 30.36 × 4 =
  31. 31.15 × 4 =
  32. 32.45 × 4 =
  33. 33.71 × 8 =
  34. 34.44 × 8 =
  35. 35.37 × 8 =
  36. 36.121 × 4 =
  37. 37.104 × 4 =
  38. 38.26 × 8 =
  39. 39.58 × 4 =
  40. 40.23 × 4 =

Answer key

  1. 88
  2. 488
  3. 216
  4. 532
  5. 208
  6. 184
  7. 364
  8. 616
  9. 180
  10. 408
  11. 504
  12. 536
  13. 372
  14. 528
  15. 204
  16. 196
  17. 376
  18. 360
  19. 424
  20. 400
  21. 144
  22. 352
  23. 576
  24. 96
  25. 160
  26. 264
  27. 264
  28. 568
  29. 152
  30. 144
  31. 60
  32. 180
  33. 568
  34. 352
  35. 296
  36. 484
  37. 416
  38. 208
  39. 232
  40. 92

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