ABACO 20 with numbers, red and blue, abacus

Abaco's popular, tried and tested counting and calculating abacuses are also available with printed numbers. This self-checking twenty square board opens up an endless variety of fun games to practise.
The balls in the rows of ten alternate between red and blue, the rear is grey. With a little finger movement to the right, each ball can be turned grey and the number value is no longer visible. This lets children practise becoming familiar with the twenties number range and they can independently check the sequence of numbers or their arithmetic tasks.

This makes it easy to use, and the abacus can be used by 1-2 children at the same time.
Since the plastic balls are recessed in the frame, they cannot be lost.

These abacuses can be stacked and so can be stored without taking up too much space.
With instructions and example applications.

• rotating balls, marked with the numbers 1-20
• for adding and subtracting plus counting, complementing and comparing,
• also useful for checking your own work

Dimensions: approx. 21.5 x 6.5 x 2 cm
Ball dimensions: approx. 14 mm