レジ算

レジ算 is an engaging Chrome extension that transforms your mental arithmetic skills with a checkout challenge game. Designed to simulate real-life cashier scenarios, it helps you quickly calculate amounts and change under time constraints. Whether practicing casually or aiming for mastery through its infinite challenge mode, this app offers a fun and effective way to improve mental calculation speed and accuracy. Perfect for users looking to sharpen their math skills in a casual, game-like environment, レジ算 brings practical daily training right to your browser.