Adding and Subtracting Fractions

What is the first step in solving this problem? 
⅘ + ½ =

• Add the top parts of the fraction
• Rewrite the fractions in the simplest form. 
• Find a common denominator. 
• Make each fraction into an improper faction. 

What is the least common denominator of 1/2 and 3/7?

• 2
• 14
• 7
• 28

1/3 + 1/9

• 4/9

• 9/12

• 6/15

• 3/12

• 5

8/15  -  1/6

• 2/3
• 7/15
• 8/11
• 11/30

1/2  -  1/8

• 5/8
• 2/5
• 3/8
• 5/6

• 14/15

• 6/2

• 3

• 10/3

What is the difference of these fractions in lowest terms?

• 7/9
• 1/5
• 12/20
• 1/20