Neumann: Adding Integers

Adding Integers

Open Ended

MODELING WITH A NUMBER LINE

1. 1. What is the arrow pointing left indicating?

2. 2. What does the arrow pointing right mean?

3. 3. Why does the left arrow start at zero, but the right arrow doesn't?

4. 4. What is the final answer to this problem?

Draw

Use the number line and draw the appropriate arrows for the problem:

-1 + 4 = ?

Write your answer on your screen.

Draw

Use the number line to draw the appropriate arrows for the problem:

1 + (-4) = ?

Write your answer on your screen.

Draw

Draw the appropriate arrows for the problem:

-1 + (-4) = ?

Write your answer on your screen.

Open Ended

1. 1. Explain why the problem -1 + 4 ended up being a positive answer, but when I changed the problem to

   1 + (-4) the answer was negative.

2. 2. How come when both numbers were negative in the problem -1 + (-4) the answer stayed negative?

Draw

Some of you might want to try adding Integers WITHOUT a number line...

Here are the rules:

Draw

Finish as many as you can in the next 5 minutes ...you may use whatever method you want.

Multiple Choice

A scuba diver is 40 feet below the surface of the water. He then dove an additional 17 feet. What is the current depth of the diver?

• 57 feet

• -57 feet

• 23 feet

• -23 feet

Open Ended

Reflect on your learning...Type a few thoughts describing some of the things you learned today.