| A | B |
| divisible | can be divided by another number without leaving a remainder |
| prime number | a whole number greater than one with exactly two whole positive factors: one and itself |
| composite number | a whole number greater than one that is not prime |
| prime factorization | the set of primes whose product is a given composite |
| multiple | the product of a given number and any whole number |
| common multiple | a number that is a multiple of each of two given numbers |
| Least Common Multiple (LCM) | the smallest multiple common to two numbers |
| fraction | a number describing part of a whole when the whole is cut into two equal pieces |
| denominator | the bottom number in a fraction, telling how many parts the whole is divided into |
| numerator | the top number in a fraction, telling how many parts of the whole are being named |
| equivalent fractions | two fractions naming the same amount |
| lowest terms | the name for a fractional amount where the numerator and denominator have a greatest common factor of one |
| Greatest Common Factor (GCF) | the greatest whole number that divides two whole numbers |
| improper fraction | a fraction whose numerator is greater than or equal to its denominator |
| mixed number | a number combining a whole number with a fraction |
| terminating decimal | a decimal number that ends on the right |
| repeating decimal | a decimal number that repeats a pattern of digits continuously on the right |
| common denominator | a denominator that is the same in two fractions |