Q&A #417

Addition error pattern

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From: Gail (for Teacher2Teacher Service)
Date: Jul 16, 1998 at 00:21:27
Subject: Re: Addition error pattern

Have you tried letting the student model the problem using place value materials? The sums for the place values can be recorded in a chart that has the places named, like this: Hundreds Tens Ones 5 6 9 3 5 0 + 3 2 3 ___ ___ ____ 16 13 12 (all of which need to be regrouped...) If the problem is modeled, the student can see that there is a place for each digit in the sum. Of course, just doing one problem won't fix the misconception. If you let the student make the "discovery" about what happens by providing guided practice that involves discussing what the student notices, s/he will draw the appropriate conclusions eventually. You can also reverse this activity, by having the student compute the sum, and then checking it with place value blocks to see if it is a sensible answer... -Gail, for the Teacher2Teacher service

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