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Montgomery County Public Schools (MCPS)
Reply to "Curriculum 2.0 Math and 4th and 5th graders"
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[quote=Anonymous][quote=Anonymous][quote=Anonymous][quote]I'm not sure what "estimating subtraction" means here, but long subtraction, while a valuable and necessary math skill, is not what adults do in their heads. Long subtraction is good for, say, subtracting two four-digit numbers if you have a pencil and paper handy -- but then you'll also have your smart phone with calculator and will probably just do it that way. When you don't have pencil and paper, you probably can't keep track of all the carrying too well and so you'll resort to making it into a mental calculation of two differences and then adding. It sounds like your son was being taught to do this, and it seems like a valid real-world skill. Hooray, 2.0![/quote] What is this new math invention ushered in with curriculum 2.0? Rounding and estimation is not new it's as old as the Colonies my dear. [/quote] Exactly, so not sure what P-PP is complaining about![/quote] Nice catch! [/quote]
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