Easy-to-understand definitions, with illustrations and links to further reading. Browse the definitions using the letters below, or use Search above.

Illustrated definition of Mathematics: The study of numbers, patterns, space, and change.

In basic mathematics there are many ways of saying the same thing ... ... bringing two or more numbers (or things) together to make a new total.

Illustrated definition of Greater Than: Larger in value. The symbol 〉 means greater than, while 〈 means less than. Example: 5...

Illustrated definition of Term: In Algebra a term is either a single number or variable, or numbers and variables multiplied together. Terms are...

Illustrated definition of Mean: The Arithmetic Mean is the average of the numbers: a calculated central value of a set of numbers. To...

Illustrated definition of Percent: Parts per 100 The symbol is % Example: 25% means 25 per 100 (25% of this box is green) So it tells you a ratio...

Illustrated definition of Slope: How steep a line is. In this example the slope is 3/5 = 0.6 Also called gradient....

Illustrated definition of Equation: An equation says that two things are equal. It will have an equals sign = like this: 7 + 2 = 10...

A function relates an input to an output. It is like a machine that has an input and an output. And the output is related somehow to the input.