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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 727 · 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. 1.52 × 8 =
  2. 2.135 × 4 =
  3. 3.33 × 4 =
  4. 4.20 × 8 =
  5. 5.40 × 8 =
  6. 6.46 × 4 =
  7. 7.13 × 4 =
  8. 8.82 × 4 =
  9. 9.157 × 4 =
  10. 10.19 × 8 =
  11. 11.15 × 8 =
  12. 12.134 × 4 =
  13. 13.134 × 4 =
  14. 14.48 × 4 =
  15. 15.116 × 4 =
  16. 16.70 × 4 =
  17. 17.145 × 4 =
  18. 18.134 × 4 =
  19. 19.72 × 4 =
  20. 20.121 × 4 =
  21. 21.145 × 4 =
  22. 22.23 × 8 =
  23. 23.40 × 8 =
  24. 24.27 × 8 =
  25. 25.62 × 8 =
  26. 26.73 × 4 =
  27. 27.101 × 4 =
  28. 28.22 × 8 =
  29. 29.114 × 4 =
  30. 30.61 × 8 =
  31. 31.45 × 4 =
  32. 32.72 × 8 =
  33. 33.26 × 4 =
  34. 34.66 × 8 =
  35. 35.34 × 4 =
  36. 36.41 × 8 =
  37. 37.145 × 4 =
  38. 38.21 × 8 =
  39. 39.28 × 4 =
  40. 40.156 × 4 =

Answer key

  1. 416
  2. 540
  3. 132
  4. 160
  5. 320
  6. 184
  7. 52
  8. 328
  9. 628
  10. 152
  11. 120
  12. 536
  13. 536
  14. 192
  15. 464
  16. 280
  17. 580
  18. 536
  19. 288
  20. 484
  21. 580
  22. 184
  23. 320
  24. 216
  25. 496
  26. 292
  27. 404
  28. 176
  29. 456
  30. 488
  31. 180
  32. 576
  33. 104
  34. 528
  35. 136
  36. 328
  37. 580
  38. 168
  39. 112
  40. 624

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