This time, I am covering the 'Multiplication of Decimals' unit from the Tokyo Shoseki 5th-grade math textbook. I spent two class periods on the beginning of this unit. Since I want to organize how I ...

You will learn how to add and subtract integers. We will work through adding and subtracting two integers up to multiple integers. We can look at adding and subtracting integers by looking at their ...

After outgrowing its original home, the National Museum of Mathematics has added new exhibits and an art gallery space in what was an empty storefront along the Avenue of the Americas in Manhattan. By ...

Is 170,141,183,460,469,231,731,687,303,715,884,105,727 prime? Before you ask the Internet for an answer, can you consider how you might answer that question without a ...

Want to learn more? Sign up for a free five-week email mini-course full of research-backed strategies to help students make sense of math. Fractions are an important building block in students’ ...

Msieve is the result of my efforts to understand and optimize how integers are factored using the most powerful modern algorithms. This documentation corresponds to version 1.54 of the Msieve library.

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 ...

The twin primes conjecture is one of the most important and difficult questions in mathematics. Two mathematicians have solved a parallel version of the problem for small number systems. On September ...