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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 736 · 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. 1.38 × 8 =
  2. 2.73 × 8 =
  3. 3.102 × 4 =
  4. 4.47 × 4 =
  5. 5.72 × 4 =
  6. 6.46 × 8 =
  7. 7.51 × 8 =
  8. 8.113 × 4 =
  9. 9.143 × 4 =
  10. 10.157 × 4 =
  11. 11.50 × 8 =
  12. 12.57 × 4 =
  13. 13.142 × 4 =
  14. 14.84 × 4 =
  15. 15.60 × 4 =
  16. 16.23 × 4 =
  17. 17.13 × 8 =
  18. 18.44 × 8 =
  19. 19.55 × 8 =
  20. 20.50 × 8 =
  21. 21.13 × 8 =
  22. 22.150 × 4 =
  23. 23.70 × 8 =
  24. 24.141 × 4 =
  25. 25.54 × 8 =
  26. 26.77 × 4 =
  27. 27.43 × 8 =
  28. 28.36 × 8 =
  29. 29.39 × 4 =
  30. 30.78 × 4 =
  31. 31.93 × 4 =
  32. 32.41 × 4 =
  33. 33.102 × 4 =
  34. 34.55 × 8 =
  35. 35.17 × 8 =
  36. 36.12 × 8 =
  37. 37.66 × 8 =
  38. 38.51 × 4 =
  39. 39.14 × 4 =
  40. 40.36 × 4 =

Answer key

  1. 304
  2. 584
  3. 408
  4. 188
  5. 288
  6. 368
  7. 408
  8. 452
  9. 572
  10. 628
  11. 400
  12. 228
  13. 568
  14. 336
  15. 240
  16. 92
  17. 104
  18. 352
  19. 440
  20. 400
  21. 104
  22. 600
  23. 560
  24. 564
  25. 432
  26. 308
  27. 344
  28. 288
  29. 156
  30. 312
  31. 372
  32. 164
  33. 408
  34. 440
  35. 136
  36. 96
  37. 528
  38. 204
  39. 56
  40. 144

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