Cross-cancellation when multiplying fractions makes me cry

[flamantrose]

So I was at work yesterday. A woman who was in my dad's class last semester was asking me for help. She told me that her instructor told them on the first day that everything they had learned up to that point was wrong. She went on to say that my dad taught her wrong in the multiplication of fractions; her current instructor said they CAN NOT

Comments

[foss4us]

Yikes... yeah, I hope he does get fired. That's not cool at all...