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Module 5 Vocabulary

TermDefinition
Counterexample A statement or example that shows a conjecture is false.
Cube root One of three equal factors a number. The cube root of 64 is 4 because 4^3=64.
Inverse operations Pairs of operations that undo each other. Addition and subtraction are inverse operations.
Irrational number A number that cannot be expressed as the ratio a/b.
Natural numbers The sets of numbers used for counting.
Perfect cube A number whose cube root is an integer. 27 is a perfect cube because its cube root is 3.
Perfect square A number whose square root is a whole number. 25 is a perfect square because its square root is 5.
Principal square root The positive square root of a number.
Radical sign The symbol used to indicate a positive square root.
Real number The set of rational numbers together with the set of irrational numbers.
Square root One of the two equal factors of a number. A square root of 144 is 12 since 12^2=144.
Truncating A process of approximating a decimal number by eliminating all decimal places past a certain point without rounding.
Created by: user-1981839
 

 



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