Elementary Math Education



Send Answer to: mathed@pegasus.cc.ucf.edu





When Subtraction Means Addition


How can you take 1 from 29 and have 30 left? Explain your answer.


Correct Solutions

  1. Paul Moore, Fernandez Elementary School, San Antonio, TX
  2. Tin Tang from Halifax Nova Scotia.
  3. Jean-Paul A. Murphy, GEMS, Merritt Island, FL
  4. Nick Baxter. Hillsborough, CA
  5. Beth Wilson. 8th grade, Apollo Jr High. Richardson, TX
  6. Denis Demandolx, Marseille, France
  7. Lakeesha Myricks, Apple Valley Middle School, Apple Valley, CA
  8. Robert Jenkins. Apple Valley Middle School, Apple Valley, CA
  9. Robert Nguyen. Apple Valley Middle School, Apple Valley, CA
  10. Jenny Martin. Apple Valley Middle School, Apple Valley, CA
  11. Michael. McAllen, TX
  12. Jessica Shan ,Fort Worth,Texas
  13. Katya Permiakova. Lisgar C.I., Ottawa, Canada
  14. Mich and Spikey. New Hialeah City, Fl
  15. Vadim Dukhan. Baltimore MD
  16. Denir Paganini Nascimento, Brazil
  17. Zic-Yun Chan
  18. Stephanie Kochis The King's Academy West Palm Beach, Fl.
  19. Wesley Attewell. William Bridge Elementary
  20. Lindsay Jordan
  21. Kelly Gabel. Churchbridge, Canada
  22. Valerie Garcia. Apple Valley Middle School, CA
  23. Nelson Chen, British Columbia, Canada
  24. Sam Wong. Daniel Woodward Elementary, Canada
  25. Stephanie Pratt. Carmen Arace Middle School, CT
  26. Lesley Houston
  27. Irene Yu. British Columbia, Canada
  28. Margaret Kwan. So. Pasadena, California
  29. Craig Schnabel, Parkston Jr. High, Parkston, South Dakota
  30. Kevin and Andrew Irving. Dinnington Comprehensive School, England
  31. Greg Hammack
  32. Elizabeth Kwan. South Pasadena Middle School, CA.
  33. Joakim Knudsen
  34. Apple Kwei, Valentine Elementary School, San Marino, CA.
  35. Simon Williamson. Chester, England
  36. Chris Thill Howards Grove,Wisconsin
  37. David Gifford
  38. Bert Sevenhant
  39. jerry snyder. baltimore md
  40. Justin Hertzog Emmaus,Pa
  41. Ryan Saul. Lake Highland Prep, Orlando, FL




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