a whole number bigger than 1 that has only 1 and itself as factors

(2,3,5,7,11,13,17,19...)

whole number that is not prime; can be divided by more than 1 and itself.

-any even number other than 2

fraction reduced down so that the only common factor for the numerator (top) and denominator (bottom) numbers is "1"

10/25=2/5

Greatest Common Divisor/Factor

GCD or GCF

the largest factor that two or more numbers or terms have in common.

12:1,2,3,4,6,12

15:1,3,5,15

a number that will divide both numbers in a fraction without a remainder.

6/15 can be reduced by 3=2/5

multiplying the numbers or terms inside parentheses to a number outside the parentheses.

2(3+2+a)=(2*3)+(2*2)+(2*a)

6+4+2a=10+2a

Least Common Multiple

LCM

the smallest number that is divisible by all numbers in a given group.

3: 3,6,9,12,15,18,21,24,27,30,...

5: 5,10,15,20,25,30,35,40,45,...

10:10,20,30,40,50,60,70,80,90,...

an expression showing a composite number as a product of its prime factors.

18=2*3²

a number written as a product of a number between 1 and 10 and a power of ten

5.3 x 10⁴