How to Rearrange an Equation

Equations in algebra can be rearranged. Imagine we have an equation:

How to Add on a Number Line

Adding on a number line is easy.


Use a number line to find 4 + 3.



Find 4 on the number line.
4 + 3
number line add step 1


Move 3 to the right along the number line.
4 + 3
number line add step 2


Read off the number you have reached. number_line_add_step_3


4 + 3 = 7

Lesson Slides

The slider below shows another real example of how to add on a number line.

Top Tip

To Add, Go Right

Adding means going right on a number line. adding_right


The Order of Adding Doesn't Matter

In our example, we have found 4 + 3.

But the order in which we add the numbers doesn't matter... we can swap the numbers around:
4 + 3 = 3 + 4
This is the commutative property of addition: you can change the order of the numbers around the sign and still get the same answer.
author logo

This page was written by Stephen Clarke.

You might also like...

Help Us Improve Mathematics Monster

  • Do you disagree with something on this page?
  • Did you spot a typo?
Please tell us using this form.

Find Us Quicker!

  • When using a search engine (e.g., Google, Bing), you will find Mathematics Monster quicker if you add #mm to your search term.

Share This Page

share icon

If you like Mathematics Monster (or this page in particular), please link to it or share it with others.

If you do, please tell us. It helps us a lot!

Create a QR Code

create QR code

Use our handy widget to create a QR code for this page...or any page.

next up:

dividing terms