What must you do first in order to add or subtract fractions with unlike denominators?

• add the numerators
• add the denominators
• find a common denominator
• find a common numerator

Tags

CCSS.7.NS.A.1C

To multiply or divide fractions and/or mixed numbers, do you need to find a common denominator?

• Yes

• No

Sally is painting her house. She used 1/8 of a gallon of paint in her bathroom, and 2/6 of a gallon of paint in her bedroom. How much paint did she use in all?

What operation would you use to solve this problem?

• add

• subtract

• multiply

• divide

Ms. Nealy is walking around Disney World. She walks 3/4 of a mile on Monday, and 1/8 of a mile on Tuesday. How many miles did Ms. Nealy walk in all?

What operation would you use to solve this problem?

• add

• subtract

• multiply

• divide

Tim has a board that is 5/6 feet long. He painted 2/18 feet of his board last night. How much more does Tim have left to paint?

What operation would you use to solve this problem?

• add

• subtract

• multiply

• divide

Dr. Stancil has 5/8 of a box of chocolate. She eats 1/4 of the box. How many chocolates are left in the box, after Dr. Stancil has eaten some?

What operation would you use to solve this problem?

• add

• subtract

• multiply

• divide

Dylan had a 4 cupcakes in his lunch bag. He ate 1/4 of it. How many cupcakes did he eat?

What operation would you use to solve this problem?

• add

• subtract

• multiply

• divide

Kai spent 24 days at Grandma's house last summer.

His sister spent ⅜ of that time at Grandma's.

How many days did Kai's sister spend at Grandma's house last summer?

What operation would you use to solve this problem?

• add

• subtract

• multiply

• divide

Ted has 18 feet of lumber. How many 2 1/2 foot shelves can he make?

What operation would you use to solve this problem?

• add

• subtract

• multiply

• divide

Ms.Lucas has a pitcher of water and it is 2/3 cups full. If she splits the water between 6 people, how much water would each get?

What operation would you use to solve this problem?

• addd

• subtract

• multiply

• divide