I’m the only square in the world. Yes I know. I’m the only square in the world. Have no fear Octoblock is here. I’ll show you. One, two three. Three blocks in my first row. One, two three.

Watch: What is a number line? A number line can be used to add and subtract. Watch the video to learn what a number line is, and how to use it! A number line is a great way to add and subtract.