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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 121 · 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. 1.61 × 8 =
  2. 2.69 × 4 =
  3. 3.69 × 8 =
  4. 4.47 × 8 =
  5. 5.18 × 8 =
  6. 6.23 × 8 =
  7. 7.46 × 8 =
  8. 8.152 × 4 =
  9. 9.30 × 8 =
  10. 10.15 × 8 =
  11. 11.21 × 4 =
  12. 12.159 × 4 =
  13. 13.30 × 4 =
  14. 14.56 × 8 =
  15. 15.32 × 4 =
  16. 16.75 × 8 =
  17. 17.75 × 8 =
  18. 18.37 × 8 =
  19. 19.121 × 4 =
  20. 20.25 × 8 =
  21. 21.12 × 8 =
  22. 22.23 × 8 =
  23. 23.39 × 8 =
  24. 24.42 × 8 =
  25. 25.59 × 4 =
  26. 26.127 × 4 =
  27. 27.66 × 8 =
  28. 28.18 × 8 =
  29. 29.29 × 8 =
  30. 30.32 × 8 =
  31. 31.37 × 8 =
  32. 32.160 × 4 =
  33. 33.46 × 8 =
  34. 34.60 × 8 =
  35. 35.68 × 8 =
  36. 36.125 × 4 =
  37. 37.114 × 4 =
  38. 38.26 × 4 =
  39. 39.67 × 8 =
  40. 40.20 × 8 =

Answer key

  1. 488
  2. 276
  3. 552
  4. 376
  5. 144
  6. 184
  7. 368
  8. 608
  9. 240
  10. 120
  11. 84
  12. 636
  13. 120
  14. 448
  15. 128
  16. 600
  17. 600
  18. 296
  19. 484
  20. 200
  21. 96
  22. 184
  23. 312
  24. 336
  25. 236
  26. 508
  27. 528
  28. 144
  29. 232
  30. 256
  31. 296
  32. 640
  33. 368
  34. 480
  35. 544
  36. 500
  37. 456
  38. 104
  39. 536
  40. 160

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