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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 222 · 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. 1.51 × 4 =
  2. 2.155 × 4 =
  3. 3.135 × 4 =
  4. 4.50 × 4 =
  5. 5.27 × 8 =
  6. 6.70 × 4 =
  7. 7.68 × 8 =
  8. 8.36 × 8 =
  9. 9.48 × 8 =
  10. 10.12 × 8 =
  11. 11.98 × 4 =
  12. 12.150 × 4 =
  13. 13.116 × 4 =
  14. 14.134 × 4 =
  15. 15.67 × 8 =
  16. 16.27 × 8 =
  17. 17.17 × 8 =
  18. 18.69 × 4 =
  19. 19.138 × 4 =
  20. 20.33 × 4 =
  21. 21.127 × 4 =
  22. 22.52 × 4 =
  23. 23.125 × 4 =
  24. 24.19 × 8 =
  25. 25.88 × 4 =
  26. 26.25 × 8 =
  27. 27.127 × 4 =
  28. 28.71 × 4 =
  29. 29.70 × 8 =
  30. 30.66 × 4 =
  31. 31.43 × 8 =
  32. 32.23 × 8 =
  33. 33.93 × 4 =
  34. 34.158 × 4 =
  35. 35.121 × 4 =
  36. 36.14 × 8 =
  37. 37.141 × 4 =
  38. 38.16 × 4 =
  39. 39.129 × 4 =
  40. 40.60 × 4 =

Answer key

  1. 204
  2. 620
  3. 540
  4. 200
  5. 216
  6. 280
  7. 544
  8. 288
  9. 384
  10. 96
  11. 392
  12. 600
  13. 464
  14. 536
  15. 536
  16. 216
  17. 136
  18. 276
  19. 552
  20. 132
  21. 508
  22. 208
  23. 500
  24. 152
  25. 352
  26. 200
  27. 508
  28. 284
  29. 560
  30. 264
  31. 344
  32. 184
  33. 372
  34. 632
  35. 484
  36. 112
  37. 564
  38. 64
  39. 516
  40. 240

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