ABACO 100 tricolor red-blue-grey, counting and calculating abacus

Three colours and innovative!
The plastic Abaco 100 tricolor counting and calculation abacus has rotating balls in three colours to enable differentiation within calculation operations With a small movement of your finger to the right, each grey ball can first be turned blue and then red.

This makes it easy to understand counting, complementing and comparing plus adding and subtracting in the number range up to 100.

This versatile abacus is suitable for every learning method and can be used to support any textbook. Since the plastic balls are recessed in the frame, they cannot be lost.

The hundred square is subdivided into 4 sections, each with 5x5 balls. This makes it easy to use, and the abacus can be used by up to 4 children at the same time.
Turning the balls is particularly easy, as there is a slight resistance between the changing colours. So you soon notice before a colour is "turned over".

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

Dimensions: ca. 25.5 x 25.5 x 2 cm
Dimensions balls: approx. 14 mm ø

• rotating balls in three colours for numbers up to 100
• for adding and subtracting plus counting, complementing and comparing
• suitable for any learning method