Adding and Subtracting Fractions

My sister and I ate some of the cookies she made. She ate 3/5 of them and I ate 1/10 of them. How much of the cookies did we eat?

• 1/2 of the cookies

• 7/10 of the cookies

• 4/15 of the cookies

Rachel spent 1/3 of her allowance on a new book and 2/5 of her allowance on some pencils. How much of her allowance did she spend?

• 2/15 of her allowance

• 3/8 of her allowance

• 11/15 of her allowance

Ms. Eager makes trail mix by combining 1/3 cup of mixed nuts, 1/4 cups of dried fruit, and 1/6 cup of chocolate chips. What is the total amount of ingredients in her trail mix?

• 7/12 cup

• 3/4 cup

• 3/13 cup

• 11/12  cup

Find the least common denominator (LCD) and write the equivalent fraction for 1/3, 1/5.

• 15, 5/15, 3/15

• 30, 5/30, 3/30

• 10, 3/10, 5/10

• 90, 20/90, 50/90

On Friday, 1/6 of band practice was spent trying on uniforms. The band spent 1/4 of practice on marching. The remaining practice time was spent playing music. What fraction of practice time was spent playing music?

• 7/12

• 1/4

• 2/10

• 2/24

Ms. George is making two batches of muffins for a school picnic. One batch of muffins uses 1/4 cup of oats and 1/3 cup of flour. How much oats and flour does Ms. George need for two batches?

• 1 1/6 cup

• 1 1/12 cup

• 2 2/3 cup

• 2 2/7 cup

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

• 9

• 8

• 12

• 6

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

Simplify the fraction
15/20

• 5/10

• 3/4

• 2/3

• 1/5

Simplify, if possible.
5 ⅙ - 3 ½ =

• 2 ⅙

• 1 ⅚

• 1 ⅔

• 2 ⅚