### Home > AC > Chapter 3 > Lesson 3.1.1 > Problem 3-4

3-4.

WHICH IS GREATER? *3-4a HW eTool* (CPM) and *3-4b HW eTool* (CPM).

Write the algebraic expressions shown below. Use “legal” simplification moves to determine which expression in the expression comparison mat is greater.

Refer to the Math Notes box in Lesson 2.1.6.

Remove zero pairs from each region of the mats.

Find the value of each mat.

Left

Right

The left Expression Comparison Mat is greater.

See the hints in part (a).

Use the eTools below to help solve the problems.

Click the link at right for the full version of the eTool: *AC 3-4a HW eTool*

Click the link at right for the full version of the eTool: *AC 3-4b HW eTool*