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A PEMDAS issue request for explanation
8 votes

I am with you on this one. I feel like concatenation (implied multiplication) is of higher precedence than explicit division. For me $8:2x$ means "8 divided by 2 x'es" - $8:(2x)$ not $4x$. Replacing $...

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How should a student's inefficient calculation be pointed out?
3 votes

I will talk about the cases when I ask one of the students to come to the board and solve an exercise. If the solution is fine (not accidental, not wrong) I let the student complete the solution. The ...

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