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# Solving Equations by Adding or Subtracting

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This lesson introduces the task of stating the various properties that were used to arrive at a solution to an equation when performing the operations of addition and subtraction. The properties introduced in this lesson are the addition property of equality, the subtraction property of equality, the inverse property of addition, the identity property of addition and the associative property of addition.

The warm up asks students to match the property with an example. Once the matches are confirmed complete, students are asked to record the example next to the property in the grid at the bottom of the warm up sheet.

There are six examples provided on the classwork worksheet where students have the opportunity to find the solution set for each equation. They are also asked to decide whether the addition property of equality or the subtraction property of equality was used. There are two additional problems on the practice worksheet that provide students with the opportunity to solve equations by following a scripted set of properties.

Finally, this lesson is concluded with an exit card that asks students to fill in the properties that were used in the solution to an equation.

A SmartNotebook file is included with this lesson.
Total Pages
10 pages
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Teaching Duration
40 minutes
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