Evaluating Expressions

Front

What does it mean to evaluate an expression?

Back

To evaluate an expression means to calculate its value by substituting the variables with their given values.

Front

Evaluate the expression: a + 6; a = 2

Back

8

Front

What is the first step in evaluating an expression?

Back

The first step is to substitute the variable with its given value.

Front

Evaluate the expression: 7(m - 6); m = 8

Back

14

Front

What is the order of operations used in evaluating expressions?

Back

The order of operations is Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right), often abbreviated as PEMDAS.

Front

Evaluate the expression: s - k + x; s = 7, k = 4, x = 6

Back

9

Front

Evaluate the expression: 7m - 6; m = 8

Back

50

Front

What is a variable in an expression?

Back

A variable is a symbol (usually a letter) that represents an unknown value.

Front

Evaluate the expression: 3 + 2x; x = 3

Back

9

Front

What is the result of evaluating an expression with no variables?

Back

The result is a constant value.