Add & Subtract Fractions

What must you have to add and subtract fractions?

• Common numerators
• Different numerators
• Different denominators
• Common denominators

8/9 - 1/3 = 

• 7/6
• 5/9
• 2/3
• 8/27

• 1/12
• 1
• 2/35
• 23/25

Aden is helping his dad paint his house. They mixed 5/9 gallons of white paint and 1/6 gallons of blue paint. How many gallons was the mixture in all?

• 6/18 gallons
• 13/18 gallons
• 4/5 gallons
• 1/6 gallons

What number could be a common denominator for these three fractions?
1/2   and   1/3   and   1/4

• 9
• 8
• 12
• 6

Is this a correct answer?

• Yes, the student correctly added.
• No, you cannot add unlike denominators
• No, 5 + 7 is not 12
• No, 2 + 3 is not 5

Destiny was to feed her dog in the morning. She was to give the large dog 7/8 of a scoop of dog food and the smaller dog 1/4 of a scoop. How much more dog food does Destiny need to give the large dog?

• 3/8 scoop

• 5/8 scoop

• 1/2 scoop

• 1 scoop

Jayden bought a 5 cup bag of pecans. If she uses 2 2/3 cups to bake cookies, how many cups of pecans will be left in the bag?

• 7 2/3 cups

• 3 2/3 cups

• 2 1/3 cups

• 3 1/3 cups

Add 2/3 + 5/12=?

• 7/12
• 1 1/12
• 11/12

4/5 - 1/20 = 

• 0
• 20/15
• 3/15
• 15/20