**Evaluating Expressions**. "

**Evaluation**" mostly

**means**"simplifying an

**expression**down to a single numerical value". Sometimes you will be given a numerical

**expression**, where all you have to

**do**is simplify; that is more of an order-of-operations kind of question.

Regarding this, how do you evaluate this?

To

**evaluate**an algebraic expression, you have to substitute a number for each variable and perform the arithmetic operations. In the example above, the variable x is equal to 6 since 6 + 6 = 12. If we know the value of our variables, we can replace the variables with their values and then**evaluate**the expression.How do you evaluate a fraction?

To

**evaluate**an expression means to find its value. Check that the**fractions**all have the same common denominators. In this example, they all have a common denominator of 10. When the**fractions**all have a common denominator, ignore the denominator and**evaluate**the numerators.