Combining Like Terms. Variable A symbol which represents an unknown. Examples: x y z m.

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Presentation transcript:

Combining Like Terms

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

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*

Algebra Tiles *These tiles are positive side up ( The red side is always negative)* 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

Jumbled Piles x x2x2 yyy x2x2 x2x2 xxx y x

x x2x2 yyy x2x2 x2x2 xxx y x Zero Pair

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 x 2 + 3x + 6 The x Tile The x 2 Tile Unit Tiles 8x 2 + 7x + 11 x2x2 x 6 x2x2 x Ex: Simplify the expression below:

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

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