The most "upsetting" ideas in basic mathematics:
1. Zero
2. Fractional numbers
3. Negative numbers
4. Irrational numbers
5. Imaginary numbers
...?
Most of these ideas relate to the extension of the realm of "number" beyond N. As a teacher I find these are the concepts that most often hold students back. What would you add to the list?
2. Fractional numbers
3. Negative numbers
4. Irrational numbers
5. Imaginary numbers
...?
Most of these ideas relate to the extension of the realm of "number" beyond N. As a teacher I find these are the concepts that most often hold students back. What would you add to the list?