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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 541 · 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. 2.47 × 8 =
  3. 3.17 × 8 =
  4. 4.84 × 4 =
  5. 5.54 × 4 =
  6. 6.37 × 8 =
  7. 7.67 × 8 =
  8. 8.50 × 8 =
  9. 9.106 × 4 =
  10. 10.45 × 8 =
  11. 11.49 × 4 =
  12. 12.25 × 8 =
  13. 13.20 × 8 =
  14. 14.71 × 8 =
  15. 15.42 × 4 =
  16. 16.25 × 4 =
  17. 17.38 × 4 =
  18. 18.29 × 4 =
  19. 19.23 × 8 =
  20. 20.67 × 8 =
  21. 21.64 × 4 =
  22. 22.49 × 8 =
  23. 23.18 × 8 =
  24. 24.42 × 4 =
  25. 25.124 × 4 =
  26. 26.141 × 4 =
  27. 27.147 × 4 =
  28. 28.49 × 8 =
  29. 29.61 × 4 =
  30. 30.72 × 8 =
  31. 31.22 × 8 =
  32. 32.37 × 8 =
  33. 33.152 × 4 =
  34. 34.157 × 4 =
  35. 35.49 × 8 =
  36. 36.45 × 8 =
  37. 37.101 × 4 =
  38. 38.29 × 8 =
  39. 39.27 × 8 =
  40. 40.135 × 4 =

Answer key

  1. 256
  2. 376
  3. 136
  4. 336
  5. 216
  6. 296
  7. 536
  8. 400
  9. 424
  10. 360
  11. 196
  12. 200
  13. 160
  14. 568
  15. 168
  16. 100
  17. 152
  18. 116
  19. 184
  20. 536
  21. 256
  22. 392
  23. 144
  24. 168
  25. 496
  26. 564
  27. 588
  28. 392
  29. 244
  30. 576
  31. 176
  32. 296
  33. 608
  34. 628
  35. 392
  36. 360
  37. 404
  38. 232
  39. 216
  40. 540

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