Lesson 3 Add and Subtract Like Fractions

Lesson 3: Add & Subtract Like Fractions Objective: Swbat add and subtract like fractions. Do Now: 1. 2 ___ 3 3 5 -2.875 ____ -2 7 3. -5 8 ____ -5.8 8 9 -0.6 ____ -3 5. -1.45 ____ -1 9 4 20

Lesson 3: Add & Subtract Like Fractions Definitions Like fractions are fractions that have the same denominators.

Lesson 3: Add & Subtract Like Fractions Sean surveyed ten classmates to find which type of tennis shoe they like to wear Shoe Type Number Cross Trainer 5 Running 3 High Top 2 What fraction of students liked to wear cross trainers? What fraction of students liked to wear high tops? What fraction liked to wear either cross trainers or high tops? Explain how to find 3/10 + 2/10. Then find the sum

Lesson 3: Add & Subtract Like Fractions To add or subtract like fractions, add or subtract the numerators and write the result over the denominator. Example 1: 5 + 2 = 5+2 = 7 9 9 9 9 Example 2: -3 + -1 = -3 + -1 = -4 5 5 5 5

Lesson 3: Add & Subtract Like Fractions To add or subtract like fractions, add or subtract the numerators and write the result over the denominator. Example 3: 5 – 7 = 5 – 7 = -2 = - 1 8 8 8 8 4 Example 4: -5 – 3 = -5 – 3 = -8 = -1 8 8 8 8

Lesson 3: Add & Subtract Like Fractions Try It! −5 8 - 3 8 = 5 8 - 7 8 = 5 9 - 2 9 = −5 9 - 2 9 = −11 12 - −5 12 =

Lesson 3: Add & Subtract Like Fractions Real-World Problem 1. Kim used fabric to make three costumes. She used ¼ yard for the first, 2/4 yard for the second, and ¾ yard for the third costume. How much fabric did Kim use altogether?

Lesson 3: Add & Subtract Like Fractions 2. About 6/100 of the population of the U.S. lives in Florida. Another 4/100 lives in Ohio. About what fraction more of the U.S. population lives in Florida than in Ohio?

Classwork Guided Practice #1-8 Independent Practice #1-9 Problem Solving #1 - 6

Closure Question: How do you Add and Subtract like fractions? Exit Ticket Homework: Practice Worksheet #1 - 23

Exit Ticket Add or Subtract the fractions, simplify. 5 + 8 = 9 9 5 + 8 = 9 9 6 - 8 = 7 7

Homework