1. Greatest Common Factor Least Common Multiple and Lowest Terms

2. Example 1 find the GCF, LCM and lowest terms of 48 and 80
Step 1: set up your upside down division 2
Step 2: find a number that will divide into both numbers
24 and 40 2
Step 3: divide 2
12 and 20
Step 4: repeat until you can’t find any common numbers to divide by
6 and 10 2
3 and 5
GCF: multiply the numbers on the outside on the left together
LCM: multiply all of the numbers on the outside together
Lowest terms: look at the bottom numbers only to make your fraction 3
2 • 2 • 2 •2 = 16
2 • 2 • 2 •2 • 3 • 5 =
240 5

3. Example 2 find the GCF, LCM and lowest terms of 208 and 112
Step 1: set up your upside down division 2
Step 2: find a number that will divide into both numbers
104 and 56 2
Step 3: divide 2
52 and 28
Step 4: repeat until you can’t find any common numbers to divide by
26 and 14 2
13 and 7
GCF: multiply the numbers on the outside on the left together
LCM: multiply all of the numbers on the outside together
Lowest terms: look at the bottom numbers only to make your fraction 13 6
= 1
2 • 2 • 2 •2 = 16
2 • 2 • 2 •2 • 7 • 13 =
1456 7 7

4. Example 1 find the GCF, LCM and lowest terms of 15 and 32
Step 1: set up your upside down division 1
Step 2: find a number that will divide into both numbers
15 and 32
Step 3: divide
Step 4: repeat until you can’t find any common numbers to divide by
GCF: multiply the numbers on the outside on the left together
LCM: multiply all of the numbers on the outside together
Lowest terms: look at the bottom numbers only to make your fraction 15 1
1 • 15 • 32 =
480 32

5. Greatest Common Factor Least Common Multiple and Lowest Terms
Date _________
Greatest Common Factor Least Common Multiple and Lowest Terms

6. Example 1 find the GCF, LCM and lowest terms of 48 and 80
Step 1: set up your
Step 2: find a number that will ______ into both numbers
Step 3:
Step 4:
GCF: multiply the numbers on the outside on the left together
LCM: multiply all of the numbers on the outside together
Lowest terms: look at the bottom numbers only to make your fraction

7. Example 2 find the GCF, LCM and lowest terms of 208 and 112

8. Example 3 find the GCF, LCM and lowest terms of 15 and 32