Adding and Subtracting FractionsWith Like Denominators

Student Expectation: 7.1 Use addition and subtraction to solve problem involving fractions.

Language Objective: Connect modeling addition and subtraction of fractions to the algorithm in our Miller Math Notes.

Adding with Like Denominators To add fractions with a common

denominator, bring the denominator over and add the numerators.

Examples I Do We Do

Examples We Do You Do

Application Dasia is making a blanket for her

sister Destiny. She wants the blanket to have a length of 5 ½ feet and a width of 4 ½ feet. What is the perimeter of the blanket?

We Do You Do

2

Process It!What is your tips list for solving these

kinds of problems?

To subtract fractions with a common denominator,

bring the denominator over and subtract the

numerators.

Practice I Do We Do

Practice We Do You Do

ApplicationAngelo and his two brothers are building a

triangular sandbox for the local neighborhood park. The sandbox has a perimeter of 50 feet. If Angelo and his brothers already have 29 feet of wood.

How much more wood do the brothers need in order to successfully complete the

sandbox project?

Regrouping a.) 1 ¾ + 8 ¼ = b.) 24 3/8 +

16 7/8 =

Subtraction Regrouping c.) 5 – 3 = d.) 48- 35 =

Application In honor of Breast Cancer

Awareness Month, the Student Council at Miller Intermediate School is making an enlarged pink ribbon to cover the football field. Each member bought ribbon, giving a total of 73 ¾ yards. If 100 yards are needed, how much more ribbon will the Student Council need to purchase?

Add/subtract and simplify. HOMEWORK!!

Exit Ticket

Give an example of a real world situation where you would have to add or subtract fractions. How would you explain how to do it to your parents?