Fractions Adding and Subtracting with Unlike Denominators

Bryan made a fruit salad. He used 1/3 cup of strawberries, 2/3 cup of grapes and 3/4 cup of pineapples. How many cups of fruit did Bryan use altogether?

• 1 and 3/4 cups

• 1 and 1/4 cups

• 1 and 7/12 cups

• 1 and 6/12 cups

What must you have to add and subtract fractions?

• Common numerators

• Different numerators

• Different denominators

• Common denominators

Abraham made two different types of cookies. He used 2/3 cup of sugar for one recipe and 2/4 cup of sugar for the other. How much sugar did he use in all?

• 1 and 1/12 cups

• 1/6 cup

• 1 and 3/12 cups

• 1 and 1/6 cups

Jennifer had 8/12 cup of water and 5/6 cup of oil that she poured into a jar for a science project on mixtures. How many cups of the water and oil mixture did she have?

• 1 and 1/6 cup

• 1/6 cup

• 2/12 cup

• 1 and 1/2 cups

Josue mixed 5/7 of a quart of blue paint and 2/3 of a quart of red paint to make purple paint. How much purple paint did he make?

• 1 and 8/21 quarts

• 1 and 1/3 quarts

• 8/21 quarts

• 1/21 quarts

Mr. Herran had 9/12 of a pizza after dinner on Friday. Saturday afternoon his kids ate 2/6 of the pizza for lunch. How much pizza did he have left?

• 1/2 of a pizza

• 29/24 of a pizza

• 5/12 of a pizza

• 7/12 of a pizza

• 5/6
• 1
• 1  1/6
• 8/6

• - 3/56
• 18/56
• - 4/15
• 29/56

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

What is the least common denominator for this problem? 3/16 + 2/4 =

• 24

• 8

• 16

• 32