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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 698 · 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. 1.108 × 4 =
  2. 2.20 × 4 =
  3. 3.36 × 8 =
  4. 4.80 × 4 =
  5. 5.58 × 4 =
  6. 6.77 × 4 =
  7. 7.57 × 4 =
  8. 8.72 × 4 =
  9. 9.38 × 4 =
  10. 10.14 × 8 =
  11. 11.121 × 4 =
  12. 12.58 × 8 =
  13. 13.44 × 8 =
  14. 14.33 × 8 =
  15. 15.49 × 8 =
  16. 16.34 × 4 =
  17. 17.113 × 4 =
  18. 18.108 × 4 =
  19. 19.44 × 4 =
  20. 20.50 × 8 =
  21. 21.15 × 8 =
  22. 22.36 × 8 =
  23. 23.44 × 8 =
  24. 24.75 × 8 =
  25. 25.25 × 4 =
  26. 26.17 × 8 =
  27. 27.14 × 8 =
  28. 28.26 × 8 =
  29. 29.87 × 4 =
  30. 30.19 × 8 =
  31. 31.13 × 8 =
  32. 32.99 × 4 =
  33. 33.61 × 4 =
  34. 34.53 × 8 =
  35. 35.118 × 4 =
  36. 36.75 × 8 =
  37. 37.61 × 8 =
  38. 38.44 × 8 =
  39. 39.85 × 4 =
  40. 40.39 × 4 =

Answer key

  1. 432
  2. 80
  3. 288
  4. 320
  5. 232
  6. 308
  7. 228
  8. 288
  9. 152
  10. 112
  11. 484
  12. 464
  13. 352
  14. 264
  15. 392
  16. 136
  17. 452
  18. 432
  19. 176
  20. 400
  21. 120
  22. 288
  23. 352
  24. 600
  25. 100
  26. 136
  27. 112
  28. 208
  29. 348
  30. 152
  31. 104
  32. 396
  33. 244
  34. 424
  35. 472
  36. 600
  37. 488
  38. 352
  39. 340
  40. 156

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