I count in memory 1 - Addition and subtraction within 12 PUS

MACHINE TRANSLATION (not authorised yet)

The booklet is to be used exclusively with the PUS Control Kit purchased separately.

The booklet is a set of tasks concerning four basic arithmetic activities, which, with their accessible and playful form, serve to learn the basics of accounting technique, to consolidate the concept of numbers and to improve the skills of symbolic recording of mathematical activities.