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# Test 2 Review

### Fractions, Square and Cube Roots, Rational and Irrational Numbers

TermDefinition
Adding Fractions must have a common denominator. Once there is a common denominator, add the numerators and keep the denominator the same.
Subtracting Fractions must have a common denominator. Once there is a common denominator, subtract the numerators and keep the denominator the same.
Multiplying Fractions multiply straight across (multiply the numerators and multiply the denominators)
Dividing Fractions multiply by the reciprocal (flip the second and multiply!)
Reciprocal the fraction flipped upside down; the reciprocal of a number is 1 divided by the number
Square Root ("radical") a number that produces a given number when multiplied by itself. For example, the square root of 25 is 5 because 5 x 5 = 25
Cube Root a number that produces a given number when multiplied by itself three times. For example, the cube root of 27 is 3 because 3 x 3 x 3 = 27
Rational Number A number that can be written as a fraction. When written as a decimal, it terminates (ends) or repeats.
Irrational Number A number that cannot be written as a fraction. As a decimal, it never ends AND never repeats.
Created by: Math7