Questions | 5 |

Topics | Adding & Subtracting Fractions, Exponent to a Power, Factorials, Least Common Multiple |

Fractions must share a **common denominator** in order to be added or subtracted. The common denominator is the least common multiple of all the denominators.

To raise a term with an exponent to another exponent, retain the base and multiply the exponents: (x^{2})^{3} = x^{(2x3)} = x^{6}

A factorial has the form n! and is the product of the integer (n) and all the positive integers below it. For example, 5! = 5 x 4 x 3 x 2 x 1 = 120.

The least common multiple (LCM) is the smallest positive integer that is a multiple of two or more integers.