P1 · Applied mathematics · MEAS.MONEY.CHF.BASIC

Use francs and centimes

Intuition

Understand first, compress later.

Mathematical models translate real situations into quantities, relationships and assumptions.

Switch representations

Making an amountCHF 24.60

notesfranc coinsrappen coins

CHF 24.60 is laid out with as few pieces as possible: always the largest one that still fits. Notes, franc coins and rappen coins are grouped separately so each group can be counted on its own.

Formal view

You can use francs and centimes when you can recognise the underlying objects, select valid rules and check each step for equivalence or logical implication.

Why does it work?

This skill sits on a prerequisite network. If a step is unstable, repair the missing prerequisite instead of merely doing more items of the same type.