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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 836 · 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. 1.14 × 8 =
  2. 2.75 × 8 =
  3. 3.69 × 8 =
  4. 4.23 × 8 =
  5. 5.21 × 8 =
  6. 6.82 × 4 =
  7. 7.64 × 8 =
  8. 8.38 × 8 =
  9. 9.24 × 8 =
  10. 10.49 × 8 =
  11. 11.96 × 4 =
  12. 12.17 × 8 =
  13. 13.30 × 4 =
  14. 14.39 × 4 =
  15. 15.131 × 4 =
  16. 16.134 × 4 =
  17. 17.127 × 4 =
  18. 18.75 × 8 =
  19. 19.38 × 4 =
  20. 20.16 × 8 =
  21. 21.67 × 8 =
  22. 22.60 × 8 =
  23. 23.81 × 4 =
  24. 24.22 × 8 =
  25. 25.40 × 4 =
  26. 26.27 × 4 =
  27. 27.38 × 8 =
  28. 28.71 × 8 =
  29. 29.51 × 8 =
  30. 30.148 × 4 =
  31. 31.34 × 8 =
  32. 32.109 × 4 =
  33. 33.155 × 4 =
  34. 34.57 × 4 =
  35. 35.12 × 8 =
  36. 36.65 × 4 =
  37. 37.108 × 4 =
  38. 38.132 × 4 =
  39. 39.123 × 4 =
  40. 40.14 × 8 =

Answer key

  1. 112
  2. 600
  3. 552
  4. 184
  5. 168
  6. 328
  7. 512
  8. 304
  9. 192
  10. 392
  11. 384
  12. 136
  13. 120
  14. 156
  15. 524
  16. 536
  17. 508
  18. 600
  19. 152
  20. 128
  21. 536
  22. 480
  23. 324
  24. 176
  25. 160
  26. 108
  27. 304
  28. 568
  29. 408
  30. 592
  31. 272
  32. 436
  33. 620
  34. 228
  35. 96
  36. 260
  37. 432
  38. 528
  39. 492
  40. 112

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