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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 594 · 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. 1.54 × 4 =
  2. 2.36 × 8 =
  3. 3.50 × 8 =
  4. 4.15 × 8 =
  5. 5.13 × 8 =
  6. 6.108 × 4 =
  7. 7.50 × 4 =
  8. 8.33 × 8 =
  9. 9.17 × 8 =
  10. 10.54 × 8 =
  11. 11.70 × 8 =
  12. 12.150 × 4 =
  13. 13.29 × 8 =
  14. 14.73 × 8 =
  15. 15.49 × 8 =
  16. 16.28 × 8 =
  17. 17.67 × 8 =
  18. 18.111 × 4 =
  19. 19.29 × 8 =
  20. 20.13 × 8 =
  21. 21.40 × 4 =
  22. 22.50 × 4 =
  23. 23.128 × 4 =
  24. 24.135 × 4 =
  25. 25.53 × 4 =
  26. 26.64 × 8 =
  27. 27.131 × 4 =
  28. 28.26 × 8 =
  29. 29.69 × 8 =
  30. 30.47 × 8 =
  31. 31.49 × 8 =
  32. 32.153 × 4 =
  33. 33.44 × 4 =
  34. 34.135 × 4 =
  35. 35.98 × 4 =
  36. 36.60 × 4 =
  37. 37.31 × 4 =
  38. 38.111 × 4 =
  39. 39.28 × 8 =
  40. 40.79 × 4 =

Answer key

  1. 216
  2. 288
  3. 400
  4. 120
  5. 104
  6. 432
  7. 200
  8. 264
  9. 136
  10. 432
  11. 560
  12. 600
  13. 232
  14. 584
  15. 392
  16. 224
  17. 536
  18. 444
  19. 232
  20. 104
  21. 160
  22. 200
  23. 512
  24. 540
  25. 212
  26. 512
  27. 524
  28. 208
  29. 552
  30. 376
  31. 392
  32. 612
  33. 176
  34. 540
  35. 392
  36. 240
  37. 124
  38. 444
  39. 224
  40. 316

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