Stretch one bar to match a stacked p + 0.05p, re-stack 6p + 9 into its greatest number of equal rows, and lay a(bp + c) flat — the length and tile count ARE the coefficients.
Expressions with rational coefficients are drawn as bars and tiles: p + 0.05p is a full p-bar plus a 5% sliver that the player matches with a single stretched bar reading 1.05p; 6p + 9 is re-stacked into equal rows to find the greatest common factor (tiles crack when the row count does not divide both terms); a(bp + c) is laid flat, tile by tile, across a zero line, so a negative multiplier visibly flips every tile. It drills the 7.EE.1–2 misconceptions that p + 0.05p is 0.05p, that any common factor is 'factored completely', and that a negative multiplier only flips the first term. Best for Grade 7.
A free, no-signup, no-ads math game for Grade 7 — practising equivalent-expressions, rational-coefficients, factoring, distributive-property, expressions. Play in your browser on the KidsDoMath games hub or explore more Coordinates & Algebra games.
By grade level: 7th Grade Math Games
More like this: Nth Term NookDistributive DepotBoth Sides Balance
What math does Expression Exchange practice? Expression Exchange practices Equivalent Expressions, Rational Coefficients, Factoring, Distributive Property. Expressions with rational coefficients are drawn as bars and tiles: p + 0.05p is a full p-bar plus a 5% sliver that the player matches with a single stretched bar reading 1.05p; 6p + 9 is re-stacked into equal rows to find the greatest common factor (tiles crack when the row count does not divide both terms); a(bp + c) is laid flat, tile by tile, across a zero line, so a negative multiplier visibly flips every tile.
What grade is Expression Exchange for? Expression Exchange is built for Grade 7 (ages 12–13). It sits in the Coordinates & Algebra strand, and it ramps across 8 levels so younger or older players find their own pace.
How do you play Expression Exchange? Stretch one bar to match a stacked p + 0.05p, re-stack 6p + 9 into its greatest number of equal rows, and lay a(bp + c) flat — the length and tile count ARE the coefficients.
Is Expression Exchange free to play? Yes. Expression Exchange is free, with no ads and no sign-up, and it runs in the browser on a phone, tablet or computer.