You can review finding the opposite of a number here.

And I'm totally serious about the adding thing!  You need to have the previous two lessons on adding signed numbers (integers) down cold... or this lesson is going to give you a major headache.

OK, if you're ready, let's go!

Here's a regular, old subtraction example:

That's easy stuff.

And, now that we have negative numbers, we can do this:

Hey, that's the exact same thing as when we did this:

Don't let the different way of writing this mess with your head.  It's just a different notation.

Continued on the next page