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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 24 · 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. 1.67 × 8 =
  2. 2.59 × 4 =
  3. 3.141 × 4 =
  4. 4.60 × 4 =
  5. 5.27 × 4 =
  6. 6.83 × 4 =
  7. 7.135 × 4 =
  8. 8.34 × 8 =
  9. 9.76 × 4 =
  10. 10.64 × 8 =
  11. 11.91 × 4 =
  12. 12.103 × 4 =
  13. 13.59 × 4 =
  14. 14.153 × 4 =
  15. 15.32 × 8 =
  16. 16.132 × 4 =
  17. 17.42 × 8 =
  18. 18.157 × 4 =
  19. 19.45 × 4 =
  20. 20.89 × 4 =
  21. 21.114 × 4 =
  22. 22.19 × 4 =
  23. 23.33 × 4 =
  24. 24.73 × 4 =
  25. 25.17 × 4 =
  26. 26.57 × 4 =
  27. 27.68 × 4 =
  28. 28.25 × 8 =
  29. 29.70 × 4 =
  30. 30.31 × 8 =
  31. 31.153 × 4 =
  32. 32.14 × 8 =
  33. 33.84 × 4 =
  34. 34.138 × 4 =
  35. 35.40 × 8 =
  36. 36.127 × 4 =
  37. 37.44 × 4 =
  38. 38.154 × 4 =
  39. 39.80 × 4 =
  40. 40.57 × 8 =

Answer key

  1. 536
  2. 236
  3. 564
  4. 240
  5. 108
  6. 332
  7. 540
  8. 272
  9. 304
  10. 512
  11. 364
  12. 412
  13. 236
  14. 612
  15. 256
  16. 528
  17. 336
  18. 628
  19. 180
  20. 356
  21. 456
  22. 76
  23. 132
  24. 292
  25. 68
  26. 228
  27. 272
  28. 200
  29. 280
  30. 248
  31. 612
  32. 112
  33. 336
  34. 552
  35. 320
  36. 508
  37. 176
  38. 616
  39. 320
  40. 456

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