### Home > CC3 > Chapter 8 > Lesson 8.2.3 > Problem 8-91

8-91.

Recall that vertical lines around a number are the symbol for the absolute value of a number. Simplify each expression.

There cannot be a negative absolute value.

When a negative is outside of the absolute value symbol, it stays a negative.

When a negative is inside of the absolute value symbol, it becomes a positive, but do not confuse this with a minus sign.

Subtract the numbers first before finding the absolute value.