PSSA Math Vocab Practice Part 1

Front

Subtraction Property of Equality: If you subtract the same number from both sides of an equation, the sides remain equal. For any numbers a, b, c, if a = b, then a - c = b - c. Example: if x = 3, then x - 2 = 3 - 2.

Back

If you subtract the same number from each side of an equation, the two sides remain equal. For any numbers a, b, and c, if a = b, then a - c = b - c. Example: if x = 3, then x - 2 = 3 - 2.

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Solution: A value for the variable that makes an equation true. Example: 12 = x + 7, solution is 5.

Back

A replacement value for the variable in an open sentence.

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Inverse Operations: Pairs of operations that undo each other. Examples: Addition & subtraction, multiplication & division.

Back

Inverse operations: Addition & subtraction, multiplication & division.

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Division Property of Equality

Back

Dividing each side of an equation by the same nonzero number keeps the two sides equal.

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Addition Property of Equality

Back

Adding the same number to both sides of an equation keeps them equal. If a = b, then a + c = b + c. E.g., if x = 3, then x + 5 = 3 + 5.

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Variable

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A letter or symbol representing an unspecified number or value.

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Property

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A statement true for any numbers or variables.

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Powers

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An expression of the form x^n, read x to the nth power. Example: 7^4 is 7 raised to the fourth power, or 7 x 7 x 7 x 7.

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Perfect Square

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A number whose square root is rational. Example: 25 is a perfect square since 25 = 5².

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Order of Operations: P E M/D A/S

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1. Evaluate grouping symbols. 2. Evaluate powers. 3. Multiplications/Divisions left to right. 4. Additions/Subtractions left to right.