1. Combining Like Terms

2. Variable A symbol which represents an unknown. Examples: x y z m

3. Expression v. Equation Expression: Numbers, symbols, and operators grouped together that show the value of something. For example: 3x – 5 Equation: A Statement formed when a equality symbol is placed between two equal expressions. For example: y = 3x – 5 *Make sure to leave the right form on any assessment*

4. Algebra Tiles *These tiles are positive side up ( The red side is always negative)* 1 1 5 1 x 1 x x y 1 y y x y Unit Tile 5 Piece x Tile x 2 Tile y Tile y 2 Tile xy Tile x x2x2 yy2y2 xy

5. Jumbled Piles x x2x2 yyy x2x2 x2x2 xxx y x

6. x x2x2 yyy x2x2 x2x2 xxx y x Zero Pair

7. Combining like Terms Terms: Variable expressions separated by a plus or minus sign. Like terms: Terms with the same variable(s) raised to the same power. Combine Like Terms: Add the the numbers the liked terms are being multiplied by. 6x 2 + 4x + 5 + 2x 2 + 3x + 6 The x Tile The x 2 Tile Unit Tiles 8x 2 + 7x + 11 x2x2 x 6 x2x2 x 5 5+66+2 4+3 Ex: Simplify the expression below:

8. Different Meanings What does the symbol below mean? Find as many ways to describe the symbol. Three different meanings: Negative Subtraction Opposite

9. x The Opposite xx Rewrite the following expression: x The opposite of…