Cuisenaire rod equations

We've been using letters instead of numbers. All thee Cuisenaire rods have different letter names:

So, looking at some good examples from Annie, seven lots of g is the same length as seven lots of r plus seven lots of w. Or in letters:

7g = 7r + 7w

The two lines are the same length, so the two rows of rods are equal.

We made our own pairs of lines of rods.

 

Later on 4G tried a pair of squares like this.

4B built on top of theirs like this.

 

And we even tried cubes!

 

Here is James P's cube and the algebra to go with it:

 

 

Have a look at a slideshow of our work.