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Montgomery County Public Schools (MCPS)
Reply to "FYI: Indiana withdrawing from Common Core standards"
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[quote=Anonymous][quote=Anonymous][quote=Anonymous] My child is in 4th grade and the common core math is making more sense this year than in past years. I also think doing subtraction of 3-digit numbers on a number line is silly. [/quote] I agree that doing subtraction of 3-digit numbers on a number line is silly. But the worksheet isn't asking you to do that. The worksheet is asking you to see what is wrong about the subtraction problem on the number line on the worksheet -- basically, to explain that when you're subtracting a 3-digit number, you're subtracting hundreds + tens + ones. (I also agree that it would be helpful to see the original worksheet, before the electrical engineer who doesn't understand number lines or place value wrote on it.)[/quote] Maybe this kind of number lines should not at all exist for 3 digit computations. Personally, I think that this is the key point.[/quote]
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