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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 515 · 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. 1.72 × 4 =
  2. 2.83 × 4 =
  3. 3.70 × 4 =
  4. 4.13 × 8 =
  5. 5.23 × 8 =
  6. 6.124 × 4 =
  7. 7.66 × 8 =
  8. 8.124 × 4 =
  9. 9.90 × 4 =
  10. 10.46 × 8 =
  11. 11.19 × 4 =
  12. 12.91 × 4 =
  13. 13.23 × 4 =
  14. 14.49 × 4 =
  15. 15.18 × 8 =
  16. 16.49 × 8 =
  17. 17.28 × 4 =
  18. 18.34 × 8 =
  19. 19.41 × 4 =
  20. 20.68 × 8 =
  21. 21.48 × 4 =
  22. 22.52 × 4 =
  23. 23.26 × 8 =
  24. 24.55 × 4 =
  25. 25.71 × 4 =
  26. 26.23 × 4 =
  27. 27.141 × 4 =
  28. 28.47 × 4 =
  29. 29.118 × 4 =
  30. 30.150 × 4 =
  31. 31.70 × 4 =
  32. 32.19 × 8 =
  33. 33.62 × 8 =
  34. 34.23 × 8 =
  35. 35.121 × 4 =
  36. 36.152 × 4 =
  37. 37.43 × 4 =
  38. 38.60 × 8 =
  39. 39.27 × 4 =
  40. 40.66 × 4 =

Answer key

  1. 288
  2. 332
  3. 280
  4. 104
  5. 184
  6. 496
  7. 528
  8. 496
  9. 360
  10. 368
  11. 76
  12. 364
  13. 92
  14. 196
  15. 144
  16. 392
  17. 112
  18. 272
  19. 164
  20. 544
  21. 192
  22. 208
  23. 208
  24. 220
  25. 284
  26. 92
  27. 564
  28. 188
  29. 472
  30. 600
  31. 280
  32. 152
  33. 496
  34. 184
  35. 484
  36. 608
  37. 172
  38. 480
  39. 108
  40. 264

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