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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 397 · 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. 1.24 × 8 =
  2. 2.29 × 4 =
  3. 3.46 × 4 =
  4. 4.59 × 8 =
  5. 5.38 × 4 =
  6. 6.35 × 8 =
  7. 7.132 × 4 =
  8. 8.34 × 4 =
  9. 9.76 × 4 =
  10. 10.15 × 8 =
  11. 11.67 × 4 =
  12. 12.111 × 4 =
  13. 13.13 × 8 =
  14. 14.25 × 8 =
  15. 15.13 × 8 =
  16. 16.41 × 8 =
  17. 17.101 × 4 =
  18. 18.54 × 8 =
  19. 19.19 × 8 =
  20. 20.33 × 8 =
  21. 21.144 × 4 =
  22. 22.23 × 8 =
  23. 23.17 × 4 =
  24. 24.21 × 4 =
  25. 25.26 × 4 =
  26. 26.32 × 8 =
  27. 27.27 × 8 =
  28. 28.44 × 8 =
  29. 29.37 × 4 =
  30. 30.134 × 4 =
  31. 31.128 × 4 =
  32. 32.97 × 4 =
  33. 33.71 × 8 =
  34. 34.116 × 4 =
  35. 35.57 × 8 =
  36. 36.23 × 8 =
  37. 37.49 × 8 =
  38. 38.58 × 8 =
  39. 39.75 × 8 =
  40. 40.25 × 8 =

Answer key

  1. 192
  2. 116
  3. 184
  4. 472
  5. 152
  6. 280
  7. 528
  8. 136
  9. 304
  10. 120
  11. 268
  12. 444
  13. 104
  14. 200
  15. 104
  16. 328
  17. 404
  18. 432
  19. 152
  20. 264
  21. 576
  22. 184
  23. 68
  24. 84
  25. 104
  26. 256
  27. 216
  28. 352
  29. 148
  30. 536
  31. 512
  32. 388
  33. 568
  34. 464
  35. 456
  36. 184
  37. 392
  38. 464
  39. 600
  40. 200

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