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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 3 · 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. 1.12 × 8 =
  2. 2.39 × 8 =
  3. 3.60 × 8 =
  4. 4.60 × 8 =
  5. 5.60 × 8 =
  6. 6.55 × 4 =
  7. 7.148 × 4 =
  8. 8.50 × 8 =
  9. 9.37 × 8 =
  10. 10.42 × 8 =
  11. 11.151 × 4 =
  12. 12.26 × 4 =
  13. 13.13 × 4 =
  14. 14.41 × 8 =
  15. 15.26 × 8 =
  16. 16.126 × 4 =
  17. 17.104 × 4 =
  18. 18.66 × 8 =
  19. 19.139 × 4 =
  20. 20.31 × 8 =
  21. 21.51 × 4 =
  22. 22.67 × 8 =
  23. 23.68 × 4 =
  24. 24.125 × 4 =
  25. 25.70 × 4 =
  26. 26.40 × 4 =
  27. 27.61 × 8 =
  28. 28.152 × 4 =
  29. 29.31 × 8 =
  30. 30.66 × 8 =
  31. 31.18 × 8 =
  32. 32.151 × 4 =
  33. 33.148 × 4 =
  34. 34.38 × 4 =
  35. 35.69 × 8 =
  36. 36.94 × 4 =
  37. 37.60 × 4 =
  38. 38.60 × 8 =
  39. 39.21 × 4 =
  40. 40.67 × 8 =

Answer key

  1. 96
  2. 312
  3. 480
  4. 480
  5. 480
  6. 220
  7. 592
  8. 400
  9. 296
  10. 336
  11. 604
  12. 104
  13. 52
  14. 328
  15. 208
  16. 504
  17. 416
  18. 528
  19. 556
  20. 248
  21. 204
  22. 536
  23. 272
  24. 500
  25. 280
  26. 160
  27. 488
  28. 608
  29. 248
  30. 528
  31. 144
  32. 604
  33. 592
  34. 152
  35. 552
  36. 376
  37. 240
  38. 480
  39. 84
  40. 536

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