터치 주판 (Cool Supan)

터치 주판 (Cool Supan) is an interactive touch abacus Chrome extension designed to teach users abacus skills step by step. Starting from basic operations involving digits 1 through 9, learners can progress through various levels including easy addition and subtraction, and extend their training to multi-digit calculations. The extension features structured lessons ranging from simple embroidery operations to complex arithmetic, allowing users to practice addition up to 100 in incremental steps.

Beyond the lessons, 터치 주판 provides a clear descriptive guide for each learning step, an undo function for correcting mistakes, and a pass-through feature enabling users to mentally solve problems. A built-in timer also helps users track their progress, making this extension a comprehensive tool for mastering abacus arithmetic in an engaging and interactive way.