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-3 + 9x4 - (4x5-4x4.3) +20(8-3/5)
What do you remember about the rules to evaluate this sort of numerical expression?"
As a point of curiosity, there a number ways to approach this problem; do we consider certain approaches to be wrong even though these other methods work? That is, should we stick to PEMDAS or would distribution be acceptable?What do you remember about the rules to evaluate this sort of numerical expression?"
-3 + 9x4 - (4x5-4x4.3) +20(8-3/5)
Using the Distributive Property on the last bit is fine.
I encourage them to separate them into separate zones and simplify separately.
-3 + 9x4 - (4x5-4x4.3) + 20(8-3/5)
Cool...of course, PEMDAS does have the advantage of having a song to remember it
http://www.youtube.com/watch?v=4xsyXu9J8CA
