September 13
2017

# Weds.-Thurs. 9/13-9/14/17 – Math

# Welcome to Math!

### Please take out:

- Signed 1.1 Quiz
- Comparing Integers sheet
- Unit 1 packet
- pencil
- Chromebook

### Warm-Up:

Preview Vocab: absolute value, credit, savings, balance, account, debt

### Lesson: 1.3 Absolute Value

**Learning Target:** Students will be able to demonstrate how to find and use an absolute value.

### Engage:

Have you ever borrowed money from a friend? How can you mathematically describe owing money?

Login on my.hrw.com and go to the Interactive Student Edition (first yellow book) –> Module 1 –> 1.3 Absolute Value

### Explore:

- Explore Activity 1, p. 19
- You can use absolute value to describe or compare real-life distances such as how far you ride a bike, dive under water, or ascend in a Ferris wheel.

- Explore Activity 2, p. 21-top of 22
- Remember: negative amounts represent points that the person needs in order to stay in the game.
- How can you tell which player needs the most points?
- If a player needs 50 points and has a change of -30 in his or her point total, how do you find the number of points the player needs?
- If a player’s point total decreases, what happens to the number of points the player needs to stay in the game?

### Explain:

- Absolute Value in a Real-World Situation: Example 1, p. 20
- How would you define a balance on a gift card?
- How would you explain what a balance of $0.00 on a gift card means?
- How can you use absolute value to show the amount Jake has left on his gift card?

- Your Turn, top of p. 21 (4-10)
- Distance is always ____.
- What can you say about the distance of numbers -55 and 55 from 0?

### Elaborate:

- Summarize: How do you use absolute value to compare two negative numbers, such as fees, or amounts owed on a credit card or other kind of loan?
- Guided Practice, p. 22.
- Remember, a credit is a payment that decreases the balance owed, while a fee is like a purchase that increases the balance.

### Homework:

- Do p. 22-24 (odds).

(Switch name cards for next class.)