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Montgomery County Public Schools (MCPS)
Reply to "Why are MoCo kids failing math exams?"
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[quote=Anonymous][quote=Anonymous]"If a number minus 53 is 154, than 154 plus 53 is that number." "If a number plus 75 is 389, then 389 minus 75 is that number." Please explain why this is not proper understanding. [/quote] This may be proper teaching. Encouraging kids to think of the number line is proper teaching. Telling kids, just take the bigger number minus the smaller number, or, whatever sign you see, do the opposite to whatever numbers you see, that's magic and just as much a memorized procedure as teaching the proper algebraic procedure except it is arbitrary to the set up of the equation and won't always work, unlike algebraic procedure which you can build on and is true always. Moving on here. This is one of my frustrations with MCPS math. Doesn't have to be yours. [/quote]
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