to find the gcf listing numbers

fill in the blanks

10:1,2,5,10

20:1,2,4,5,10,20

Greatest Common Factor

using the Ladder Method

using the common factor multiply the two numbers to find your GCF - should equal the same number as the number you found using the list method

30                    42

2                        15                    21

3                          5                      7

Multiply 2 X 3 = 6 (GCF)

First, find the GCF of bothe numbers

Then divide the numerator & denominator by the GCF

Check your answer: multiply the numerator & denominator by the GCF

Divide the numerator & denominator by the GCF

get the fractions into the simplest form

Divide the numerator by the denominator

write down the whole number answer

then write down any remainder above the denominator

1. multiply the whole number part by the fraction's denominator

2. add that to the answer

3. then write the result on top of the denominator