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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 718 · 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. 2.21 × 4 =
  3. 3.19 × 8 =
  4. 4.73 × 4 =
  5. 5.31 × 4 =
  6. 6.44 × 8 =
  7. 7.25 × 8 =
  8. 8.60 × 8 =
  9. 9.51 × 8 =
  10. 10.33 × 4 =
  11. 11.14 × 4 =
  12. 12.148 × 4 =
  13. 13.133 × 4 =
  14. 14.90 × 4 =
  15. 15.60 × 8 =
  16. 16.70 × 8 =
  17. 17.65 × 4 =
  18. 18.100 × 4 =
  19. 19.90 × 4 =
  20. 20.22 × 4 =
  21. 21.64 × 8 =
  22. 22.79 × 4 =
  23. 23.79 × 4 =
  24. 24.31 × 8 =
  25. 25.74 × 8 =
  26. 26.40 × 8 =
  27. 27.47 × 4 =
  28. 28.74 × 8 =
  29. 29.127 × 4 =
  30. 30.12 × 8 =
  31. 31.47 × 8 =
  32. 32.62 × 8 =
  33. 33.23 × 8 =
  34. 34.45 × 4 =
  35. 35.60 × 8 =
  36. 36.139 × 4 =
  37. 37.13 × 8 =
  38. 38.47 × 4 =
  39. 39.34 × 8 =
  40. 40.25 × 8 =

Answer key

  1. 360
  2. 84
  3. 152
  4. 292
  5. 124
  6. 352
  7. 200
  8. 480
  9. 408
  10. 132
  11. 56
  12. 592
  13. 532
  14. 360
  15. 480
  16. 560
  17. 260
  18. 400
  19. 360
  20. 88
  21. 512
  22. 316
  23. 316
  24. 248
  25. 592
  26. 320
  27. 188
  28. 592
  29. 508
  30. 96
  31. 376
  32. 496
  33. 184
  34. 180
  35. 480
  36. 556
  37. 104
  38. 188
  39. 272
  40. 200

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