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Montgomery County Public Schools (MCPS)
Reply to "Math 2.0 Subtraction-Decomposing -- HELP"
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[quote=Anonymous][quote=Anonymous]Hi, I need to help my son and I do not understand decomposing. I know decomposition, but not this decomposing. Someone please help me! For example - the worksheet my son brought home: For the problem: 698 [u]-327[/u] The sheet asks him to fill in the blanks: _ _ _ -_ _ _ [u] _ _+_ = _ I understand decomposition: 600 + 90 + 8 minus 300 + 20 + 7. I do NOT understand the problem the way the worksheet laid it out. with the two hundreds numbers going to a ten plus a one to equal a one digit? [/quote] OP here. I heard back from her teacher. Each line is supposed to have the entire expanded number (600 in the first line, 90 in the second, etc.) I am used to putting one digit on each line which is why this was confusing. She had other math sheets which only had one digit per line so it was inconsistent. Anyway, it is expanded notation and then subtraction. Gota love the new terminology.[/quote]
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