Math isn't just about numbers anymore! It's about numbers, and letters (also called variables), and and SIGNS.

Knowing what the sign rules are and when to use them is key to succeeding in your math class. In this post we will focus on adding and subtracting sign numbers.

Here is a link to a video explaining the sign rules for addition and subtraction of sign numbers (click here!)

Watch the video and then try these practice problems:

1.) -5 + 6 =

2.) 22 - 10 =

3.) -14 - 23 =

4.) 6 - 6 =

5.) -6 - 6 =

6.) 32 - 12 =

7.) -9 + 4

8.) -12 + 42 =

9.) 50 - 20 =

10.) -55 + 25 =

Answers:

1.) 1 2.) 12 3.) -37 4.) 0 5.) -12 6.) 20 7.) -5 8.) 30 9.) 30 10.) -30

You can find LOTS of practice problems on the Community College of Philadelphia's Math Department page. Click here and work through the first three and a half pages of signed number problems.

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