• Currently 4.0/5 Stars.
6301 views, 4 ratings - 00:10:55
Part of video series Operations with Integers
Taught by YourMathGal

### Meets NCTM Standards:

More free YouTube videos by Julie Harland are organized at http://yourmathgal.com
Shows how to add postive and negative numbers; uses counters.

• Alien Addition Game - Game from Math Game Time: Alien Addition is a fun math game which helps kids practice their addition skills. Invading spaceships with math problems move down from the top of the screen toward a laser cannon on a platform at the bottom. Hit the spacebar to shoot the correct answer!
• How do you add positive and negative numbers?
• What does it mean to add positive and negative numbers?
• What are the formal rules for adding positive and negative integers?
• How do you add 3 + -5?
• How would you add -3 + -4?
• How do you know how to add positive and negative numbers?
• How do you add -4 and -2 by drawing - signs?
• How do you show 3 + 2 using a picture?
• How do you add two numbers that have the same sign?
• How do you add two numbers with different signs?
• How do you add 3 and -6?
• How do you add two numbers by drawing a picture if the negative number is larger than the positive number?
• How could you add -7 + -10 without drawing a picture?
• How do you know how to add -100 + -200 + -300 without a calculator?
• How do you know whether an addition problem like -12 + 3 will be positive or negative?
• Why do you subtract if you are adding two numbers with different signs?
• How can you figure out what -22 + 10 equals?
• What does 32 + -11 equal?
• Where can I find a bunch of example problems of adding positive and negative numbers?
This lesson introduces adding integers by using + signs and - signs. A lot examples are shown and explained. You will learn how to draw pictures for problems as well as the rules for adding integers with different signs.
• Currently 4.0/5 Stars.
Reviewed by MathVids Staff on October 10, 2009.  