Mental Math Menu

Although calculators and computers are extremely good at performing whatever kind of arithmetic or algebra you care to throw their way, mental math is very useful when you either don't have a calculator or computer or when you want to estimate some value quickly. Take a look at the various things that can be computed in your head!

Memorization

How to Memorize

Practicing Memorization

Useful Numbers to Know

Basic Mathematics

How to Count Quickly

Addition and Subtraction

Doubling and Halving

Estimation

Arithmetic

Multiplication

Multiplication Tricks

Division

Factoring

Multiple Multiplication

Fraction Approximation

Reciprocation

Algebra

Difference Between Squares

Sums of Series

Higher Arithmetic

Logarithm Basics

Logarithmic Computation

Square Roots

Cube Roots

Scientific Notation

Differrent Bases

Primality

Integral Roots