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# Math Gr 8 Chpt 1 Voc

### Chpt 1 Vocabulary

Equation An expression showing the equality of 2 quantities such as 2 +3 = 5 or 4x + 2 = 14
Inverse operation Inverse operations are opposite operations. Addition is the opposite of subtraction; division is the opposite of multiplication, and so on.
Distributive property Multiplying each term inside the parentheses with the term outside of the parentheses.
variable A symbol for a number we don't know yet. It is usually a letter like x or y. Example: in x + 2 = 6, x is the variable.
addition property of equality States that if the same amount is added to both sides of an equation, then the equality is still true.
Subtraction property of equality States that when both sides of an equation have the same number subtracted from them, the remaining expressions are still equal. For example: If 5 = 5, then 5 - 2 = 5 - 2.
Multiplication property of equality States that when both sides of an equation are multiplied by the same number, the remaining expressions are still equal. For example: If 5 = 5, then 5 x 2 = 5 x 2.
Division property of equality States that if you divide both sides of an equation by the same nonzero number, the sides remain equal.
like terms Terms that have the exact same variables and exponents, but they can have different coefficients. 6x, 52x, -3x---Not 7y
volume Volume is the measure of the amount of space inside of a solid figure, like a cube, ball, cylinder or pyramid. V= l x w x h
perimeter the total distance around the edge of the figure.
literal equation An equation that has 2 or more variables and
expression A mathematical phrase that can contain ordinary numbers, variables (like x or y) and operators such as add,subtract,multiply, and divide. It does not have an equal sign
solve find the value of a numerical or algebraic expression.
evaluate find the value of a numerical or algebraic expression.
Created by: ellist