Reveal Math Grade 8 Module 2 Vocab

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Bar Notation

Back

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Counterexample

Back

A statement or example that shows a conjecture is false. For instance:

Examples of negative numbers are:

-4, -6.5 or -1/3

Counterexamples:

16, 3 or 1/2

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Cube Root

Back

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Integers

Back

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Inverse Operations

Back

Pairs of operations that undo each other.

Addition & Subtraction are inverse operations.

7 + 3 = 10

7 = 10 - 3

Multiplication & Division are inverse operations.

2 x 5 = 10

10 / 2 = 5

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Irrational Number

Back

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Natural Numbers

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Perfect Cube

Back

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Perfect Square

Back

A number whose square root is a whole number.

Example: 25 is a perfect square because its square root is 5.