### Home > MC1 > Chapter 3 > Lesson 3.3.3 > Problem 3-86

3-86.

This problem is very similar to problem 3-66. Last time, you were told how many pieces

to add or subtract. This time, you will need to use the skills you have attained to determine

how best to reach −2 by adding two pieces.

Since the current value of this diagram is −2, you will need to add one negative piece

and one positive piece to keep the value of −2.

You already know the current value is −2. By only removing pieces from the picture,

how does −2 become 2? Think about this question, then proceed with the problem.

Use the etool below for help.

Click the link at right for the full version of the eTool: MC1 3-86 HW eTool