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# Applications with Operations

Lesson 8 of 12

## Objective: SWBAT create expressions using order of operations criteria and evaluate the expressions.

#### Launch

*10 min*

We will use **My Favorite No** as the Problem of the Day to start the lesson. Students will solve this problem: -2(6 + 9) / 7(2-4).

I select the My Favorite No based on common errors I see. If several students are making the same mistake, I try to address that. It becomes my favorite because it provides a good learning opportunity. When working with order of operations, the most common error I see my students make is that they will only multiply in order from left to right. I'm anticipating there will be confusion as to how to handle the division. They have memorized the mnemonic but will be uncertain about the actual application.

#### Resources

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#### Explore

*25 min*

Students will be put into pairs and given an Application with Operations card. Using the description on the card, each pair will write three expressions. On a separate sheet of paper, students will solve the expressions. Pairs will then trade expressions and solve the expressions from the other group. Once the expressions are solved, the authors will grade the solutions they are given. If errors are made, we will use those expressions and solutions as discussion points with the whole class. We will also use volunteered expression to model finding the solutions for the class.

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#### Summary

*3 min*

I will use the **Traffic Light **strategy to close the lesson and gain some insight into what my students understand about applying order of operations. I want them to comment on their learning during the lesson.

#### Resources

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- UNIT 1: Welcome to 7th Grade!
- UNIT 2: Number System
- UNIT 3: Geometric Measurement
- UNIT 4: Integers
- UNIT 5: Simplifying Expressions
- UNIT 6: Proportional Relationships
- UNIT 7: Percent Relationships
- UNIT 8: Equations and Inequalities
- UNIT 9: 2-D Measurements
- UNIT 10: 3-D Measurements
- UNIT 11: Angles
- UNIT 12: Probability

- LESSON 1: Converting Fractions
- LESSON 2: Multiplying Fractions
- LESSON 3: Repeating Decimals
- LESSON 4: Equivalent Fractions
- LESSON 5: Road Trip
- LESSON 6: Write It Wednesday NS
- LESSON 7: Operations with Rational Numbers
- LESSON 8: Applications with Operations
- LESSON 9: Percents Intro
- LESSON 10: Modeling with Percents
- LESSON 11: Number System Assessment
- LESSON 12: Converting Fractions II