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數學

A laptop and an open textbook on a desk
@naosamiy

yslab

An antique abacus resting on a wooden floor
tamu1500t

tamu1500

Abstract image of colorful swirling lights around a lens
@koto_bridge琴

琴橋

Workspace featuring a coffee cup and laptop
@naosamiy

yslab

Laptop on a desk with a coffee cup glasses and a smartphone visible
@naosamiy

yslab

Image of a traditional abacus with various colored beads arranged
mire2024m

mire2024

Close-up of a wooden abacus featuring smooth grains and reddish-brown beads
mire2024m

mire2024

A blue notebook and a calculator placed on a wooden table
@poteton18ぽ

ぽて

Side of a white building featuring the number B-77 against a blue sky
@calm739seaし

しずか