Did you know the division algorithm is already a mental math process?

As we’ve seen before, left-to-right algorithms tend to be easier to do mentally. Fortunately we…

Every once in a while you come across a list of numbers to add that leaves you reaching for your calculator. Today we’ll look at some alternatives for summing those numbers mentally.

Sometimes a change in perspective can make all the difference.

If you like the traditional addition algorithm but find it difficult to do mentally, maybe left-to…

By the end of this article you’ll have the tools to calculate percentages mentally. So leave that calculator at home and take the challenge! But first we need to add another…

Percentages. They come up all the time, in the most casual places: shopping, dining out, grabbing a latte, checking grades, banking, taxes … that makes them the most valuable everyday math…

Versatile. Adaptable. Modular. Empowering.

The technique I’m showing you today is all of these things and more. It will make long-hand division a thing of the past and encourage you to divide mentally…

Learning division was exciting for me. Multiplication had been mostly memorization, but division… now that separated the real 4th grade mathletes from the rest of the lot.

The number 9 has a reputation for being difficult to multiply by. Which is a shame because it is actually an incredibly easy number to multiply. In fact, using a simple trick we can…

Mental math tricks. Aren’t they great? Little cheats and shortcuts to get you to your destination quicker and easier. And I’ve got another for you! This one will enable you to…

5.18 seconds — that’s all the time it took to do the following calculation mentally.

And I’m confident you can learn this trick for two-by-two multiplication too.