also: たまざん
noun
abacus calculation; arithmetic with an abacus
Refers to the skill or act of performing arithmetic using a soroban (Japanese abacus). Often associated with mental calculation training.
彼女は珠算が得意で、暗算も速い。
She is good at abacus calculation and also quick at mental arithmetic.
小学校で珠算を習った。
I learned abacus calculation in elementary school.
Rare variant using 玉 instead of 珠; reading たまざん is less common than しゅざん.
From 珠 (bead, referring to abacus beads) and 算 (calculation). The reading しゅざん is the on'yomi, while たまざん is a mixed on-kun reading.