| A | B |
| compatible numbers | numbers that are easy to divide mentally |
| like fractions | fractions with the same denominator |
| reciprocal | any two numbers whose product is one |
| unlike fractions | fractions with different denominators |
| improper fraction | the numerators (top number) are bigger than the denominators (bottom numbers) |
| proper fraction | the numerators are less than the denominators |
| mixed number | indicates the sum of a whold number and a fraction |
| numerator | names the units being added or subtracted |
| fraction | an expression that is wrtten as a numerator over a denominator and separated by a line |
| least common denominator | used to rename unlike fractions when you are adding or subtracting them |
| denominator | part of the fraction that tells how many units the fraction contains |
| simplest form | reducing a fraction until it cannot get any smaller |