# flash cards 11-03

## 14 terms

### like fractions

fractions that have the same denominator

### unlike fractions

fractions with different denominators

### subtract 2 like fractions

subtract numerators, keep denominators

1)rewrite the fractions using a common denominator

### subtract 2 unlike fractions

1)rewrite the fractions using a common denominator
2)subtract them as like fractions

### prime number

A whole number whose only factors are 1 and itself

### composite number

an number that is divisible by at least one number other than itself and one

### write a number as a product of primes

use a factor tree

### a

the result of multiplying n copies of a number a

### exponet

a # that represent the # of times the number is used

### common denominator

an integer that is a common multiple of the denominators of two or more fractions

### LCM

the smallest multiple that is exactly divisible by every member of a set of numbers

### LCM of the numbers a and b

the smallest number that both a and b divide