Tap unit-factor cards onto a chain and flip them so every unwanted unit appears top and bottom and cancels — what survives is the converted answer, from km/h to m/s.
A start quantity such as 72 km/h sits as a fraction and the player chains factor cards (1000 m / 1 km, 1 h / 60 min, 1 min / 60 s) onto it, tapping a card to flip it; a unit is struck through the moment it appears on both top and bottom, so the surviving units show the result and the numbers follow — 20 m/s. Later rounds hand over a chain with cards upside down to fix, then ask for the arithmetic card by card (a number on top multiplies, on the bottom divides). It targets the misconception that conversion is a single multiply-or-divide guess, drilling dimensional analysis across length, time, volume, mass, rates, and squared units (7.RP.1, science prep). Best for Grades 7–8.
A free, no-signup, no-ads math game for Grades 7–8 — practising unit-conversion, dimensional-analysis, rates, metric, measurement. Play in your browser on the KidsDoMath games hub or explore more Measurement games.
By grade level: 7th Grade Math Games8th Grade Math Games
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What math does Conversion Chain practice? Conversion Chain practices Unit Conversion, Dimensional Analysis, Unit Rates, Metric. A start quantity such as 72 km/h sits as a fraction and the player chains factor cards (1000 m / 1 km, 1 h / 60 min, 1 min / 60 s) onto it, tapping a card to flip it; a unit is struck through the moment it appears on both top and bottom, so the surviving units show the result and the numbers follow — 20 m/s.
What grade is Conversion Chain for? Conversion Chain is built for Grades 7–8 (ages 12–14). It sits in the Measurement strand, and it ramps across 8 levels so younger or older players find their own pace.
How do you play Conversion Chain? Tap unit-factor cards onto a chain and flip them so every unwanted unit appears top and bottom and cancels — what survives is the converted answer, from km/h to m/s.
Is Conversion Chain free to play? Yes. Conversion Chain is free, with no ads and no sign-up, and it runs in the browser on a phone, tablet or computer.