Basic calculators

 

There are several basic tactile calculators on the market. Mental calculations or arithmetics are important for braille users and it's something they should practice before they start to work with algorithms. Also, they train their short-term memory doing so. You can find more information on the subject of linear calculating using algorithms under the heading 'Good practice'.

1) Abacus:

Abacus

 

2) Cubarithm:

The Cubarithm consists out of a partitioned board in wood or plastic, and small plastic or metal cubes with braille numbers and operational signs embossed on them.

Cubarithm

 

 3) Dattiloritmica:

The Dattiloritmica is a mechanical device made out of plastic. By pushing one of the four buttons in a braille cel, a braille dot arises which makes it possible to write in braille. 

Dattiloritmica