Blog Archives - Skyline Middle School Math

#4 Elimination by Multiplication

4/29/2015

You're now pretty good at solving a system by using subtraction and addition. But what if there aren't any obvious terms to combine like 4x and -4x or 2y and 2y? The answer is multiplication! What we did with terms like 2y and 2y was just multiply the equation by a -1, so you really already know how to do this. This video will explain it even better.

#3 Solving Systems of Equations-Elimination-Subtraction

4/27/2015

Today instead of using addition to eliminate a term, we will be using subtraction to eliminate a term. When we added, we needed to make sure that one set of like terms was opposite one another like: -4x and 4x.
With subtraction you will need to have your like terms be...alike. Get and idea of how to do this by watching and noting this video.

#2 Solving Systems of Equations Using Elimination

4/21/2015

You will once again need your iPad. Today we will be using a process of elimination, specifically addition to solve a system of two equations. Using this video, make a sketch-note that you can use solve even more unsuspecting problems.

#1 Solving Systems of Equations Using Graphs.

4/20/2015

You are going to NEED your iPad, some graph paper, and a writing utensil. I have chosen a pencil. I'm a fan of erasers.
We will be watching and sketch-noting a video. This video, in fact. Once you have finished your sketch, we will be looking at one another's to steal ideas and put them on our own sketches.
After that, we will test our skills on a few unsuspecting problems.