About MathNana
A calculator that only prints an answer teaches you nothing. Everything here shows the working and names the rule behind each line.
What this site is
MathNana is a free set of maths calculators and explainers. Every calculator prints the steps it took and, next to each step, the rule that made that step legal — the same way a solution is annotated in an exercise book.
What it is not
It is not a tutoring service. There is nobody to ask, no lessons to book and no account to make. The site is built so you do not need any of that: each topic names what you need to know first, where the common mistakes are, and what to learn next.
Why it is free
Because the alternative is a paywall in front of a step someone needs at eleven at night. Every calculator and every explanation is available without an account.
Who it is for
Students working through homework alone, adults coming back to maths after years away, and anyone who got an answer from another calculator and still does not know why it is the answer.