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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 587 · 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. 1.15 × 8 =
  2. 2.23 × 8 =
  3. 3.52 × 4 =
  4. 4.134 × 4 =
  5. 5.103 × 4 =
  6. 6.42 × 8 =
  7. 7.73 × 4 =
  8. 8.24 × 8 =
  9. 9.13 × 8 =
  10. 10.119 × 4 =
  11. 11.93 × 4 =
  12. 12.75 × 8 =
  13. 13.95 × 4 =
  14. 14.19 × 8 =
  15. 15.159 × 4 =
  16. 16.76 × 4 =
  17. 17.33 × 4 =
  18. 18.131 × 4 =
  19. 19.39 × 8 =
  20. 20.34 × 4 =
  21. 21.81 × 4 =
  22. 22.154 × 4 =
  23. 23.70 × 8 =
  24. 24.72 × 8 =
  25. 25.131 × 4 =
  26. 26.67 × 4 =
  27. 27.108 × 4 =
  28. 28.130 × 4 =
  29. 29.85 × 4 =
  30. 30.27 × 8 =
  31. 31.43 × 8 =
  32. 32.64 × 8 =
  33. 33.32 × 8 =
  34. 34.153 × 4 =
  35. 35.147 × 4 =
  36. 36.138 × 4 =
  37. 37.13 × 4 =
  38. 38.15 × 8 =
  39. 39.115 × 4 =
  40. 40.17 × 8 =

Answer key

  1. 120
  2. 184
  3. 208
  4. 536
  5. 412
  6. 336
  7. 292
  8. 192
  9. 104
  10. 476
  11. 372
  12. 600
  13. 380
  14. 152
  15. 636
  16. 304
  17. 132
  18. 524
  19. 312
  20. 136
  21. 324
  22. 616
  23. 560
  24. 576
  25. 524
  26. 268
  27. 432
  28. 520
  29. 340
  30. 216
  31. 344
  32. 512
  33. 256
  34. 612
  35. 588
  36. 552
  37. 52
  38. 120
  39. 460
  40. 136

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