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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 431 · 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 × 8 =
  2. 2.48 × 4 =
  3. 3.19 × 8 =
  4. 4.116 × 4 =
  5. 5.52 × 8 =
  6. 6.142 × 4 =
  7. 7.49 × 4 =
  8. 8.39 × 8 =
  9. 9.127 × 4 =
  10. 10.24 × 8 =
  11. 11.130 × 4 =
  12. 12.81 × 4 =
  13. 13.135 × 4 =
  14. 14.27 × 8 =
  15. 15.110 × 4 =
  16. 16.72 × 8 =
  17. 17.14 × 8 =
  18. 18.13 × 4 =
  19. 19.63 × 8 =
  20. 20.52 × 4 =
  21. 21.74 × 4 =
  22. 22.73 × 4 =
  23. 23.47 × 8 =
  24. 24.84 × 4 =
  25. 25.16 × 4 =
  26. 26.49 × 4 =
  27. 27.19 × 4 =
  28. 28.81 × 4 =
  29. 29.12 × 8 =
  30. 30.36 × 8 =
  31. 31.63 × 4 =
  32. 32.50 × 4 =
  33. 33.64 × 8 =
  34. 34.50 × 4 =
  35. 35.160 × 4 =
  36. 36.25 × 8 =
  37. 37.150 × 4 =
  38. 38.76 × 4 =
  39. 39.15 × 8 =
  40. 40.30 × 8 =

Answer key

  1. 176
  2. 192
  3. 152
  4. 464
  5. 416
  6. 568
  7. 196
  8. 312
  9. 508
  10. 192
  11. 520
  12. 324
  13. 540
  14. 216
  15. 440
  16. 576
  17. 112
  18. 52
  19. 504
  20. 208
  21. 296
  22. 292
  23. 376
  24. 336
  25. 64
  26. 196
  27. 76
  28. 324
  29. 96
  30. 288
  31. 252
  32. 200
  33. 512
  34. 200
  35. 640
  36. 200
  37. 600
  38. 304
  39. 120
  40. 240

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