The word Calculus comes from Latin meaning small stone, because it is like understanding something by looking at small pieces.

And Differential Calculus and Integral Calculus are like inverses of each other, similar to how multiplication and division are inverses, but that is something for us to discover later!

Illustrated definition of Calculus: A branch of mathematics that looks at how things change, or how things add up, by breaking them into really small...

The Derivative tells us the slope of a function at any point. There are rules we can follow to find many derivatives.

It is all about slope! Slope = Change in Y / Change in X. We can find an average slope between two points. But how do we find the slope at a point?

Sometimes we cant work something out directly ... but we can see what it should be as we get closer and closer ... Lets work it out for x=1

In simple terms these are the fundamental theorems of calculus: Derivatives and Integrals are the inverse (opposite) of each other.

Math explained in easy language, plus puzzles, games, quizzes, worksheets and a forum. For K-12 kids, teachers and parents.

Apr 19, 2010 · Math explained in easy language, plus puzzles, games, worksheets and an illustrated dictionary. For K-12 kids, teachers and parents.

Integration is a way of adding slices to find the whole. Integration can be used to find areas, volumes, central points and many useful things.