Adding and Subtracting fractions

What is the least common denominator you could use to subtract 1/3 and 1/4?

• 3
• 4
• 24
• 12

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. 

• 5/14
• 3/7
• 5/7
• 5/14

• 4/5
• 4/10
• 2/5
• 5

9/12 + 3/12

• 12/2
• 1
• 12
• 1/2

The number on the top of a fraction is called what?

• numerator
• denominator
• fractionator
• equivalent

What do you need to have when adding unlike fractions?

• common denominator
• common numerator
• common numerator and denominator

3/5 + 3/10

• 9/12

• 9/10

• 3/5

• 6/10

5/12 + 1/3

• 6/12

• 9/12

• 6/15

• 3/4

1/3 + 1/9

• 4/9

• 9/12

• 6/15

• 3/12