Every math answer,
explained.
Fractions, expressions and algebra — worked out step by step, checked by an exact arithmetic engine. Free practice sheets, printable.
Fractions
Fractions, decoded
Type any fraction. Get the decimal, the percent and the steps.
More fractions (3/8, 2/5, 1/8, 28/30) are on the way — the first batch is live now.
Expressions
Answers for what you actually type
Students search the raw expression. We simplify it — reduced form, decimal and percent.
Algebra concepts
Concepts with pictures, not walls of text
Each page: definition, diagram, worked examples, common mistakes.
Practice
Make a worksheet. Print it. Done.
Fresh problems every time — answer key on its own page.
Exact engine
Every answer computed with integer arithmetic — never rounded by hand.
Verified solutions
Worked solutions independently double-checked before publish.
No paywall
All steps, all worksheets, free. No account, no subscription.
FAQ
Quick answers
Is mathplum free?
Yes. Every explanation, every step and every printable worksheet is free. There is no account, no subscription and no paywall.
Where do the answers come from?
Every number is computed by an exact rational arithmetic engine — integer-based fraction arithmetic with no floating-point rounding. The same engine powers the lessons and the worksheet answer keys.
Can I print worksheets for my class?
Yes. The fraction and math worksheet generators make a fresh set of problems at the level you choose, with a separate answer key page. Print as many as you need.
Who writes mathplum?
mathplum is built and maintained by Nan Liang. Explanations are written for students and parents and independently double-checked before publishing.