| A | B |
| divisible | able to be divided by without a remainder |
| prime number | a number with exactly 2 factors |
| composite number | a number with 3 or more factors |
| factors | numbers that are multiplied |
| product | the answer to a multiplication problem |
| GCF | the greatest number that is a factor of 2 or more numbers |
| prime factorization | a way to write a number as the product of all prime factors |
| factor tree | a method for prime factorization that uses factor pairs |
| inverted division | a method for prime factorization that uses division |
| Fundamental Theorem of Arithmetic | every whole number can be written uniquely as the product of prime factors |
| multiples | the product of a number and 1,2,3,etc |
| LCM | the lowest number that 2 or more numbers go into |
| relatively prime | when the GCF is 1 |
| Sieve of Eratosthenes | a tool for finding all the primes less that 100 |
| Rational Number | a number that can be written as a fraction of integers |
| Irrational Number | a non-terminating and non-repeating decimal |
| repeating decimal | a decimal number with a repeating block of digits |
| terminating decimal | a decimal that ends |
| Integers | Whole Numbers and their Opposites |
| Real Numbers | all Rational and Irrational numbers together |
| improper fraction | when the numerator is greater than the denominator |
| mixed number | a whole number combined with a fraction |
| canceling common factors | when you divide any numerator and denominator by the same factor |
| lowest terms | when the numerator and denominator are relatively prime |
| reciprocals | two numbers whose product is one |
| multiplicative inverse property | When the product of a number and its reciprocal is one |
| the rule for dividing | multiply by the reciprocal |
| algebraic fractions | fractions that contain variables |
| like fractions | fractions with the same denominator |
| unlike fractions | fractions with different denominators |
| LCD | the LCM of the denominators |
| equivalent | having the same value |