beginning-algebra-writing-equations-for-word-problems

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Interactive video lesson plan for: Beginning algebra: writing equations for word problems

Activity overview:

We look at four different word problems and write an equation for each. The first one involves the perimeter of a parallelogram. The second, area of a two-part rectangle. The third one has to do with the ages of two people - we know one is four times as old as the other, and 40 years older than the other. In the last problem, we're given the aspect ratio and the perimeter of a rectangle, and the task is to find the side lengths.

For each problem, write a fairly simple linear equation and then solve the equation. I also solve some problems without the equation first - so you can see how the mental math or bar diagram solution steps match with the steps of solving the equation.

This lesson is meant for pre-algebra or for beginning algebra students.

See also my other pre-algebra videos at http://www.mathmammoth.com/videos/prealgebra/pre-algebra-videos.php

Tagged under: pre-algebra,algebra,grade 7,math,equation,write equation,word problem,perimeter,area,age problem

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