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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 655 · 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. 2.54 × 8 =
  3. 3.32 × 8 =
  4. 4.21 × 4 =
  5. 5.13 × 8 =
  6. 6.93 × 4 =
  7. 7.138 × 4 =
  8. 8.38 × 8 =
  9. 9.22 × 8 =
  10. 10.26 × 8 =
  11. 11.119 × 4 =
  12. 12.66 × 8 =
  13. 13.44 × 8 =
  14. 14.32 × 8 =
  15. 15.135 × 4 =
  16. 16.19 × 8 =
  17. 17.77 × 4 =
  18. 18.142 × 4 =
  19. 19.123 × 4 =
  20. 20.75 × 8 =
  21. 21.48 × 8 =
  22. 22.22 × 8 =
  23. 23.104 × 4 =
  24. 24.68 × 8 =
  25. 25.40 × 8 =
  26. 26.118 × 4 =
  27. 27.76 × 4 =
  28. 28.59 × 8 =
  29. 29.71 × 8 =
  30. 30.68 × 4 =
  31. 31.38 × 4 =
  32. 32.18 × 4 =
  33. 33.92 × 4 =
  34. 34.39 × 8 =
  35. 35.65 × 8 =
  36. 36.72 × 8 =
  37. 37.42 × 4 =
  38. 38.72 × 4 =
  39. 39.38 × 8 =
  40. 40.145 × 4 =

Answer key

  1. 528
  2. 432
  3. 256
  4. 84
  5. 104
  6. 372
  7. 552
  8. 304
  9. 176
  10. 208
  11. 476
  12. 528
  13. 352
  14. 256
  15. 540
  16. 152
  17. 308
  18. 568
  19. 492
  20. 600
  21. 384
  22. 176
  23. 416
  24. 544
  25. 320
  26. 472
  27. 304
  28. 472
  29. 568
  30. 272
  31. 152
  32. 72
  33. 368
  34. 312
  35. 520
  36. 576
  37. 168
  38. 288
  39. 304
  40. 580

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