### Home > CCAA > Chapter 2 Unit 4 > Lesson CC3: 2.1.4 > Problem 2-42

W

A zero pair is a positive and negative of the same shape in the same box.

Use the expression mat in the eTool below to simplify the algebraic expression.

Click the link at right for the full version of the eTool: 2-42a HW eTool

Flip all shapes in the bottom box to the top. If they are positive make them negative. If they are negative make them positive.

Make any zero pairs you can.

Simplify

Use the expression mat in the eTool below to simplify the algebraic expression.

Click the link at right for the full version of the eTool: 2-42b HW eTool

Follow the steps in part (a).

2

Use the expression mat in the eTool below to simplify the algebraic expression.

Click the link at right for the full version of the eTool: 2-42c HW eTool

Follow the steps in part (a).