WISSNER Re Wood 20 Inch Student Abacus
- Basic operations (addition, subtraction, multiplication and division) and numerical comparisons from 0 to 20 can be learned or consolidated in a simple and clear way.
- Have fun while learning with our calculation frame 20 x 4.5 x 6 cm.
- Our company has more than a 40 years long commitment in the education and training of children.