### Home > MC2 > Chapter 5 > Lesson 5.2.1 > Problem 5-45

5-45.

Write the expression shown on each of the Expression Mats below, then simplify them by making zeros and combining like terms. .

Notice that a grey tile and a white tile of the same value cancel each other out and make a zero.

Now write an expression for the values that remain.

See part (a).

Use the eTool below to solve part (a).

Click the link at right for the full version of the eTool: *MC2 5-45a HW eTool*

Use the eTool below to solve part (b).

Click the link at right for the full version of the eTool: MC2 5-45b HW eTool