This is called repeated addition. You add the same number lots of times. This can also be written as a multiplication calculation. There are five equal groups of two. The five represents the number of ...

Last week in this post, I asked for requests for math topics you’d like to read about. One person wrote in and asked: Last week in this post, I asked for requests for math topics you’d like to read ...

A new proof has debunked a conspiracy that mathematicians feared might haunt the number line. In doing so, it has given them another set of tools for understanding arithmetic’s fundamental building ...