For a complete lesson on addition word problems, go to http://www.MathHelp.com – 1000+ online math lessons featuring a personal math teacher inside every lesson! In this lesson, students learn to solve addition and subtraction word problems. Note that key words for addition are: altogether, total, in all. Key words for subtraction are: left, remaining, more, fewer, increase, go up, grow, decrease, go down, reduce. And key words for estimation are: estimate, approximately.

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