| A | B |
| like fractions | Fractions with the same denominator. |
| unlike fractions | Fractions with different denominators. |
| compatible numbers | Numbers that are easy to divide mentally. |
| reciprocals | Any two numbers whose product is 1. |
| sequence | A list of numbers in a specific order. |
| numerator | The number above the fraction bar. |
| denominator | The number below the fraction bar. |
| mixed number | The sum of a whole number and a fraction. |
| improper fraction | A fraction that has a numerator that is greater than or equal to the denominator. |