Math Unit 5 Lesson 5

Unit 5 Lesson 6 and 7

Let's bring addition and subtraction together.

Let's apply what we know about signed numbers to different situations.

Poll

How do you feel bout adding and subtracting integers?

Agenda

• Warm-Up: Activity 6.1: Number Talk, Missing Addend

• Activity 6.2: Expression with Altitude

• Activity 6.3: Does the Order Matter?

• Activity 7.3: Solar Power

Warm-Up

Activity 6.1: Number Talk: Missing Addend

Activity 6.2: Expressions with Altitude

A mountaineer is changing elevations. Write an expression that represents the difference between the final elevation and the beginning elevation. Then write the value of the change

Example:

Beginning: +400

Final: +900

Difference: 900-400

Change: +500

You will be given the Beginning and Final pieces and then be asked what is the Difference and Change.

Activity 6.3

Does the order matter?

Think about it!

Do you think the order matters?

Compare the problems in Column A to those in Column B and justify your thinking!

Poll

Does the order matter?

Activity 7.3

Solar Power

Here's the deal...

Han's family got a solar panel. Each month they get a credit to their account for the electricity that is generated by the solar panel. The credit they receive varies based on how sunny it is.

Here is their electricity bill from January.

Question 1

In July they were traveling away from home and only used $19.24 worth of electricity. Their solar panel generated $22.75 worth of electricity.

What was their amount due in July?

Question 2

The table shows the value of the electricity they used and the value of the electricity generated each week for a month.

What amount is due for this month?

Fill in the Blanks

Poll

How do you feel about adding and subtracting integers?