About maths.free
A place where every answer shows its work.
Most maths help online stops at the answer — a number at the bottom of a page, or a photo of someone else's working. maths.free is built on the opposite idea: the answer is the least interesting part. What teaches is the sequence of moves that gets there, and what it looks like.
So every problem you type is solved by a computer algebra system that applies one rule at a time and says which rule it used — the product rule, a row operation, a step of Euclid's algorithm — and animates the sequence. Where a picture helps, there is one: curves with their roots, surfaces you can rotate, triangles drawn to scale from your numbers, matrices drawn as the vectors they move.
The answer is hidden until you ask for it, because looking at an answer before you have tried is how you learn nothing. And for problems no algebra system can take apart — word problems, proofs, famous open questions — a tutor model breaks them into the smallest parts you can attack, tells you what is known, and hides the solution the same way.
It is free to use, has no ads, and covers arithmetic, algebra, number theory, geometry, trigonometry, calculus, linear algebra, statistics and discrete mathematics, in a hundred languages.