Abacus Classroom 3x20
nIn modern arithmetic, multi-base work is demonstrated clearly using this abacus. Very easy to understand addition, abstraction.
size: 30x15cm classroom.
Abacus student 's tool to demonstrate additions and subtractions up to 100.
nContents: A wooden frame with 10 wooden bars and 100 plastic beads (55 red and 45 white).
nDimensions: 17x26 cm