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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 837 · 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. 1.32 × 8 =
  2. 2.140 × 4 =
  3. 3.63 × 8 =
  4. 4.26 × 8 =
  5. 5.19 × 8 =
  6. 6.53 × 8 =
  7. 7.142 × 4 =
  8. 8.70 × 8 =
  9. 9.46 × 4 =
  10. 10.110 × 4 =
  11. 11.66 × 8 =
  12. 12.155 × 4 =
  13. 13.48 × 8 =
  14. 14.25 × 8 =
  15. 15.120 × 4 =
  16. 16.23 × 8 =
  17. 17.34 × 8 =
  18. 18.27 × 8 =
  19. 19.157 × 4 =
  20. 20.36 × 8 =
  21. 21.65 × 8 =
  22. 22.73 × 8 =
  23. 23.13 × 8 =
  24. 24.140 × 4 =
  25. 25.17 × 4 =
  26. 26.42 × 8 =
  27. 27.15 × 4 =
  28. 28.72 × 8 =
  29. 29.137 × 4 =
  30. 30.125 × 4 =
  31. 31.24 × 4 =
  32. 32.103 × 4 =
  33. 33.75 × 4 =
  34. 34.36 × 8 =
  35. 35.12 × 8 =
  36. 36.111 × 4 =
  37. 37.132 × 4 =
  38. 38.147 × 4 =
  39. 39.71 × 8 =
  40. 40.50 × 8 =

Answer key

  1. 256
  2. 560
  3. 504
  4. 208
  5. 152
  6. 424
  7. 568
  8. 560
  9. 184
  10. 440
  11. 528
  12. 620
  13. 384
  14. 200
  15. 480
  16. 184
  17. 272
  18. 216
  19. 628
  20. 288
  21. 520
  22. 584
  23. 104
  24. 560
  25. 68
  26. 336
  27. 60
  28. 576
  29. 548
  30. 500
  31. 96
  32. 412
  33. 300
  34. 288
  35. 96
  36. 444
  37. 528
  38. 588
  39. 568
  40. 400

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