Lesson 1
Using Variables to Write Expressions Variables are letters in an expression that are used to represent missing numbers.
Expressions are math problems that use multiple operations and variables to solve Ex. 3x+2 |
Lesson 2
Order of Operations Order of Operations is a specific set of instructions that must be used to solve expressions with multiple math operations.
PEMDAS is a mnemonic device that will help you remember what order to use in solving the expressions P=parentheses 1st E=exponents 2nd M=multiplication D=division (solve M & D from left to right) A=addition S=subtraction (solve A & S from left to right) |
Lesson 3
Simplifying Expressions EXAMPLE
3 + (7 - 4) x 2 1st - (7 - 4) = 3 3 + 3 x 2 2nd - 3 x 2 = 6 3 + 6 = 9 The value of this expression is 9. |
Lesson 4
Evaluating Expressions |
Lesson 5
Addition and Subtraction Expressions |