Adding and Subtracting Related Fractions

Brianna filled an bathtub with 6/8 gallon of water.  Soon she realized that there was only 4/8 gallon of water.  How much water leaked out of the tub?

• 3/8

• 2/8

• 10/8

• 10/12

Review: What is 1/10 + 5/10?

Landon has 8/10 of his lawn left to mow. He mows 6/10 of the lawn before breaking for breakfast. How much more of the lawn does Landon have left to mow?

Kirk has 3/4 of a carton of eggs. He uses some of the eggs to make an omelette and now has 2/4 of the carton left. What fraction of the carton did Kirk use?

What is the sum of these fractions in lowest terms?

• 4/5

• 3/20

• 17/20

• 4/20

What is the sum of these fractions in lowest terms?

• 5/12

• 5/24

• 6/12

• 6/144

What is the sum of these fractions in lowest terms?

• 22/5

• 6/3

• 22/15

• 6/15

What is the sum of these fractions in lowest terms?

• 3/8

• 3/15

What do you need to have when adding unlike fractions

• common denominator

• common numerator

• common numerator and denominator

• common fractions