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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 417 · 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. 1.65 × 4 =
  2. 2.77 × 4 =
  3. 3.46 × 8 =
  4. 4.27 × 8 =
  5. 5.51 × 4 =
  6. 6.26 × 4 =
  7. 7.19 × 4 =
  8. 8.63 × 8 =
  9. 9.74 × 8 =
  10. 10.27 × 8 =
  11. 11.75 × 8 =
  12. 12.55 × 8 =
  13. 13.25 × 8 =
  14. 14.56 × 4 =
  15. 15.96 × 4 =
  16. 16.40 × 8 =
  17. 17.81 × 4 =
  18. 18.147 × 4 =
  19. 19.43 × 4 =
  20. 20.18 × 8 =
  21. 21.65 × 4 =
  22. 22.20 × 8 =
  23. 23.12 × 8 =
  24. 24.12 × 8 =
  25. 25.109 × 4 =
  26. 26.26 × 8 =
  27. 27.159 × 4 =
  28. 28.48 × 8 =
  29. 29.157 × 4 =
  30. 30.159 × 4 =
  31. 31.35 × 8 =
  32. 32.69 × 8 =
  33. 33.85 × 4 =
  34. 34.19 × 8 =
  35. 35.39 × 4 =
  36. 36.28 × 8 =
  37. 37.30 × 8 =
  38. 38.64 × 8 =
  39. 39.39 × 8 =
  40. 40.26 × 8 =

Answer key

  1. 260
  2. 308
  3. 368
  4. 216
  5. 204
  6. 104
  7. 76
  8. 504
  9. 592
  10. 216
  11. 600
  12. 440
  13. 200
  14. 224
  15. 384
  16. 320
  17. 324
  18. 588
  19. 172
  20. 144
  21. 260
  22. 160
  23. 96
  24. 96
  25. 436
  26. 208
  27. 636
  28. 384
  29. 628
  30. 636
  31. 280
  32. 552
  33. 340
  34. 152
  35. 156
  36. 224
  37. 240
  38. 512
  39. 312
  40. 208

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