Solving equations using algebra tiles - 3 examples

In this post there are 3 examples for using algebra tiles to solve equations, a free set of paper algebra tiles and a free algebra tiles worksheet solving mat. Algebra tiles are awesome for making algebra visual, hands-on and help introduce students to new difficult topics in a fun way.

There are so many cool ways to use algebra tiles in math. Last week I wrote a post about using them to factor. In this post I wanted to show 3 examples for using algebra tiles to solve equations.

I'm using a set of paper algebra tiles in the photos, mainly so that I could cut one in half for example 2 that involves a fraction. 

So let's get into it!


Here are 3 examples for using algebra tiles to solve equations, a free set of paper algebra tiles and a free algebra tiles worksheet solving mat. Algebra tiles are awesome for making algebra visual, hands-on and help introduce students to new difficult topics in a fun way. Also includes a video to see the mat and tiles in action solving equations.


Example 1: 

Solve 2x + 3 = 11 with algebra tiles.


>>A paper version of the solving mat can be found for free here or here. My friend Laura from EngagEDucate reached out about making a digital Google Slides version. That digital version can be found here.

The rectangular tiles are used to represent x and the small squares are each used to represent 1.


In this photo, the 3 squares on the left got recycled along with 3 squares on the right, leaving 2x = 8.


Here's the fun part! We can split the 2x into x and x and make equal groups of the small squares on the other side.


After recycling one group, we get x = 4.

Using algebra tiles to solve 2-step equations is an incredible way to introduce the topic. 


Example 2:
Solve ½x + 4 = 7 with algebra tiles.

Here is a quick video showing this example:


It's nice to use paper algebra tiles (free here) for this example so that an x can be cut in half. (We still keep the other half for the end.)


First I cut an x in half to show the ½x.


Here we can see our equation set up.


We recycle the 4 squares on the left and 4 on the right, leaving ½x = 3.


Now we bring in that other ½x from earlier. Because we just doubled our x, we have to double the other side. This gives us x = 6.


Example 3:

Solve 2x - 3 = 7 with algebra tiles. 


To get negative tiles with paper, you can print on 2-sided paper, like astrobrights, or glue two pieces of paper together before cutting. 

Here we have 2 x tiles and 3 negative tiles on the left and 7 tiles on the right.


To get rid of that -3 on the left, we +3 to make a zero pair. Then we have to +3 to the right, too.


The zero pair gets recycled since it's 0. Now we have 2x = 10.


And now back to the fun part: splitting into equal groups.


And recycling the extra stuff to get x = 5.


Video:
Here is a video showing all 3 examples in this post:


Resources:

Algebra tiles can be found here.

Paper solving mat can be found here.

Digital Google Slides solving mat can be found here

Solving equations activities can be found here.


Scaffolded Math and Science blog



No comments:

Post a Comment