What is the distributive property? Why do we need it when we already have an order of operations for simplifying expressions? When can't we use it?
http://www.youtube.com/watch?v=Ohw6whHKuyY
Nothing we study is a waste. But the precision of math helps refine how we think in a very special way.
http://www.youtube.com/watch?v=Ohw6whHKuyY
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