# 5th Grade Adding and Subtracting Fractions

#### 1 Adding and Subtracting Fraction Review

**Lesson: **

Whole Group: Roughly 15-20 minutes

__EXPLAIN__to the students that you will be relearning how to add and subtract fractions with like denominators in word problems.

Adding Fractions with Like Denominators Question

__PLAY__the Khan Academy “Piano” lesson.__Stop__the lesson after each arrow is drawn on the screen and__DISCUSS__why these arrows are important and why visuals are important.__PLAY__lesson.__STOP__after the equation ¾ - ¼ = is given.__EXPLAIN__why he chose to you subtraction in the equation. After the video ends,__RE-EXPLAIN__simplifying to the students and__ASK__if anyone has any questions.__WRITE or PROJECT__on the board a similar question: Sally is supposed to cut a loaf of bread into 8/12. She has already cut the bread into 4/12. What fraction does she still need to cut?__WORK__together as a class (asking them to give the step by step) to answer the question.

Subtracting Fractions with Unlike Denominators Question

__PLAY__the Khan Academy “Lizard” lesson.__STOP__the lesson after he counts the extra 8 marks in the inch.__DISCUSS and EXPLAIN__why he has done this.__PLAY__lesson.__STOP__after he quickly say 8 goes into 17, 2 times with a remainder of 1.__REMIND__your students how this works. (18/4 = long division 18 divided by 4 = 4 goes into 18, 4 times with a remainder of 2. Do this with two more problems. 13/3 and 29/6).__PLAY__lesson.__STOP__after he counts off the additional 10.__DISCUSS and EXPLAIN__why he added the 10 instead of starting over.__PLAY__lesson.__STOP__before he gives the mixed number answer.__STUDENTS WORK__have the students try to get the correct answer. Have the students flip their paper over and put their pencils down once they work out the problem.__PLAY__lesson and show the answer.__ASK__the students to give a thumbs up or down if they got the answer correct.__WALK__around to see who missed it and pull them aside after the lesson.

__WRITE or PROJECT__on the board a similar question:

Frank has a pencil with an eraser that is 5/6 long, and the wood section is 14/6 long. What is the length of the eraser and wood section of the pencil?

__WORK__ together as a class (asking them to give the step by step) to answer the question.

Small Group Work Centers: 45 min with 15 min centers

- Group students into 3 groups of 6. Explain to the students that when they hear the timer they need to rotate clockwise within the classroom.

Center 1: Quizlet Flashcards - the students will access the Quizlet Fraction Flashcards and go through them until they hear the timer.

Center 2: Small Group with Teacher - In this group the teacher will have the Standards Mastery Adding and Subtracting Test A form projected for the group. The teacher will go through the 6 problems step by step assisting when needed.

Center 3: Woot Woot Math - The students will login to their Woot Woot account and work on the fraction refresher.