| A | B |
| numerator | the top number of a fraction |
| denominator | the bottom number of a fraction |
| mixed number | a whole number and a fraction |
| improper fraction | a fraction that has a larger numerator than denominator |
| multiple | the product of two or more numbers |
| common multiples | multiples of one number that are also multiples of another number |
| least common multiple (LCM) | smallest number that is a common multiple |
| square number | the product when two factors are the same |
| prime number | has two factors, 1 and itself |
| composite number | has more than two factors |
| greatest common factor (GCF) | greatest factor that has two or more numbers in common |
| equivalent fractions | fractions that name the same amount |
| simplest form | when the greatest common factor, or GCF, of the numerator and denominator is 1 |
| like fractions | fractions that have the same denominator |
| least common denominator (LCD) | the least common multiple, or LCM, of two or more denominators |