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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 712 · 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. 1.45 × 8 =
  2. 2.74 × 4 =
  3. 3.33 × 8 =
  4. 4.148 × 4 =
  5. 5.141 × 4 =
  6. 6.122 × 4 =
  7. 7.23 × 8 =
  8. 8.24 × 8 =
  9. 9.157 × 4 =
  10. 10.39 × 4 =
  11. 11.21 × 4 =
  12. 12.47 × 8 =
  13. 13.40 × 8 =
  14. 14.66 × 4 =
  15. 15.58 × 8 =
  16. 16.32 × 8 =
  17. 17.17 × 8 =
  18. 18.14 × 4 =
  19. 19.22 × 8 =
  20. 20.105 × 4 =
  21. 21.51 × 4 =
  22. 22.52 × 8 =
  23. 23.39 × 8 =
  24. 24.34 × 4 =
  25. 25.29 × 8 =
  26. 26.70 × 8 =
  27. 27.43 × 8 =
  28. 28.61 × 8 =
  29. 29.57 × 8 =
  30. 30.36 × 4 =
  31. 31.28 × 8 =
  32. 32.25 × 4 =
  33. 33.32 × 4 =
  34. 34.30 × 4 =
  35. 35.43 × 8 =
  36. 36.73 × 4 =
  37. 37.47 × 8 =
  38. 38.30 × 8 =
  39. 39.113 × 4 =
  40. 40.68 × 4 =

Answer key

  1. 360
  2. 296
  3. 264
  4. 592
  5. 564
  6. 488
  7. 184
  8. 192
  9. 628
  10. 156
  11. 84
  12. 376
  13. 320
  14. 264
  15. 464
  16. 256
  17. 136
  18. 56
  19. 176
  20. 420
  21. 204
  22. 416
  23. 312
  24. 136
  25. 232
  26. 560
  27. 344
  28. 488
  29. 456
  30. 144
  31. 224
  32. 100
  33. 128
  34. 120
  35. 344
  36. 292
  37. 376
  38. 240
  39. 452
  40. 272

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