1.
abacus
A calculating device consisting of a frame with rods and movable beads, traditionally used for arithmetic calculations.
The 算盤 (Japanese abacus) has been used in Japan for centuries. Despite calculators, abacus education remains popular as it develops mental calculation skills.
STRUCTURE:
The Japanese abacus has:
- 5 beads on the lower deck (each worth 1)
- 1 bead on the upper deck (worth 5)
- Multiple columns for different place values
ABACUS EDUCATION:
- 算盤教室: abacus school
- 珠算: abacus calculation, soroban arithmetic
- 暗算: mental arithmetic (often trained through soroban)
- 珠算検定: abacus proficiency test
CULTURAL NOTE:
Many Japanese children attend after-school abacus classes (算盤塾) to develop calculation skills and concentration.