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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 150 · 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. 1.120 × 4 =
  2. 2.76 × 4 =
  3. 3.157 × 4 =
  4. 4.73 × 8 =
  5. 5.15 × 8 =
  6. 6.39 × 4 =
  7. 7.15 × 8 =
  8. 8.70 × 8 =
  9. 9.74 × 8 =
  10. 10.26 × 8 =
  11. 11.72 × 8 =
  12. 12.27 × 4 =
  13. 13.50 × 8 =
  14. 14.109 × 4 =
  15. 15.83 × 4 =
  16. 16.116 × 4 =
  17. 17.53 × 4 =
  18. 18.26 × 8 =
  19. 19.20 × 8 =
  20. 20.62 × 8 =
  21. 21.46 × 4 =
  22. 22.33 × 4 =
  23. 23.13 × 8 =
  24. 24.29 × 8 =
  25. 25.30 × 4 =
  26. 26.64 × 8 =
  27. 27.42 × 4 =
  28. 28.33 × 4 =
  29. 29.58 × 4 =
  30. 30.39 × 4 =
  31. 31.22 × 8 =
  32. 32.20 × 4 =
  33. 33.29 × 4 =
  34. 34.57 × 8 =
  35. 35.28 × 4 =
  36. 36.121 × 4 =
  37. 37.151 × 4 =
  38. 38.100 × 4 =
  39. 39.80 × 4 =
  40. 40.77 × 4 =

Answer key

  1. 480
  2. 304
  3. 628
  4. 584
  5. 120
  6. 156
  7. 120
  8. 560
  9. 592
  10. 208
  11. 576
  12. 108
  13. 400
  14. 436
  15. 332
  16. 464
  17. 212
  18. 208
  19. 160
  20. 496
  21. 184
  22. 132
  23. 104
  24. 232
  25. 120
  26. 512
  27. 168
  28. 132
  29. 232
  30. 156
  31. 176
  32. 80
  33. 116
  34. 456
  35. 112
  36. 484
  37. 604
  38. 400
  39. 320
  40. 308

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