Debt & Credit

You hold a hand of signed transaction cards: credits add to your balance, debits subtract. Play and unplay cards to set your total, watching the live balance, then end the round to settle. Land inside the safe band, or exactly on a target, to survive and move on. Each round the numbers swing wider, so the arithmetic of staying in range gets tighter.

• Credit cards (+) raise the balance; debit cards (−) lower it.
• Toggle cards on and off to fine-tune your total before settling.
• Settle inside the safe band, or exactly on the target, to advance.
• Swings grow each round, demanding more careful combinations.

• Daily: the same deal for everyone, in Easy, Medium, or Hard.
• Practice: fresh random deals at your chosen difficulty.

• Desktop: click cards to play or unplay them; Clear cards resets, End round settles.
• Phone & tablet: tap cards to add or remove them, then tap End round.

• Add up your committed cards as you go so you always know how far you are from the band.
• Pair a big debit with a big credit to make fine adjustments without overshooting.
• Aim for the centre of the band, not its edge, to leave room for rounding in your favour.

Debt & Credit builds comfort with positive and negative numbers by framing integer arithmetic as balancing an account of debts and credits.

• Skills: integers and signed numbers, integer addition and subtraction, real-world modeling
• Best for: roughly grades 6–8 (ages 11–14)
• For parents & teachers: a money model that makes negatives intuitive.

Credits that add and debits that subtract are the original reason negative numbers exist: as the reference puts it, a debt that is owed may be thought of as a negative asset.

The original element is the live balance and the safe band — you must land inside a range, or exactly on a target, before settling.

Accounting is where negative numbers were accepted long before mathematicians were comfortable with them, precisely because a debt is obviously real even when "less than nothing" sounds absurd. Playing the ledger reaches the idea by the same road.

Debt & Credit is an original, free browser game that builds comfort with positive and negative numbers by framing integer addition as balancing an account. Play instantly, no sign-up.

A free, original browser game on PlayPendium. No download, no install.