1. I CAN Evaluate Algebraic Expressions
6th grade Math
6.EE.2c

2. Vocabulary
Variable: a letter that is used to represent a number. Variables are always lowercase letters.
Algebraic Expression: a mathematical phrase that has at least one variable; it can contain numbers and operation symbols. It does NOT contain an = sign.

3. Notes To evaluate an algebraic expression:
You replace each variable in the expression with a number or numerical expression
Perform all possible mathematical operations following the order of operations.
PEMDAS
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

4. Notes
Anytime you have a number beside of a variable (example: 3x) or two variables side-by-side (example: xy) this represents multiplication.
Anytime you have a variable by itself, there is an understood “invisible” 1 in front of the variable, but you NEVER write the 1.
Ex.: 1x is written as just x.

5. Evaluate each expression.
7b, for b = 5
5 – c, for c = 3
5x + 𝑥 3 , for x = 2
4c – 7 + 2d, for c = 2 and d = 5

6. More Examples 6 ÷ a + 8, for a = 2 𝑥 2 ÷ 8, for x = 8
3n + 2, for n = 7

7. The formula P = 2l + 2w gives the perimeter P of a rectangular room with the length l and width w. A rectangular living room is 26 feet long and 21 feet wide. What is the perimeter?

8. Task Cards
Write down the problem once you substitute in for the variable.
Then solve.