Abacus Student 3×20
Abacus Student 3×20. Learn place value, addition and subtraction and visualise (large) numbers.
Practise the principle of ‘borrowing’ from the next column. The beads that are not used disappear behind the wooden partition.
This abacus represents units, tens and hundreds.
It contains 3 x 20 beads in 6 colours grouped in tens.
wooden holder with partition (18 x 10 x 6 cm)
60 flat plastic beads in 6 colours (1.5 cm ?)