Math practice · reimagined
Expressions
Turn Expressions into a fight you actually want to win. Every problem is an attack — solve it faster than your opponent and you land the hit.
Ages 4–99+ · no download · plays in your browser · 23 languages
How it works
Expressions
Pick a fighter, choose Expressions, and trust your numbers. The faster and cleaner you solve, the harder you hit — from gentle early grades all the way to Olympic-level challenges.
Algebra starts to feel manageable the moment you realise that x is just a thing you are counting.
Five x plus three x is eight x, for exactly the reason five apples plus three apples is eight apples. The letter names WHAT you have; the number in front — the coefficient — says how many. Adding them changes the count and leaves the thing alone.
Terms that share the same letter are called LIKE terms, and only like terms can be combined. 5x + 3y stays as it is, because apples and pears do not add into a single pile.
So the whole skill here is: find the coefficients, add them, and keep the x. The answer is a number of x's, and it is that number you type.
— Quick answers —
Expressions: the short FAQ
- Is Expressions free to play?
- Yes. Expressions is free to play right in your browser — the whole curriculum, no download, no signup. Paid plans later unlock the full fighter roster, every stage and saved progress.
- Who is Expressions for?
- Anyone from 4 to 99+. The early grades stay gentle for beginners, while the higher tiers will make even the confident sweat.
- Do I need to download anything to play Expressions?
- Nope. Expressions runs in any browser, on a laptop, tablet or phone.
- Can Expressions be used in the classroom?
- Absolutely. Teachers run Expressions with a whole class and track who's improving — see the schools plan for per-student pricing and a teacher dashboard.