Get stories worth sharing delivered to your inbox
By signing up you agree to Upworthy's privacy policy.
Trending Stories
\u003C/p>\u003Cp>But if there's a finger method you want to try for addition and subtraction up to 99, one that's simple and quick to learn is called chisanbop, in which ones are counted on one hand and 10s are counted on the other. Here's an explainer video that shows how it works:\u003C/p>","embedUrl":"https://www.youtube.com/watch?v=s6OmqXCsYt8","name":"Watching kids do lightning fast mental math is both mesmerizing and mind-blowing","thumbnailUrl":"https://assets.rebelmouse.io/eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpbWFnZSI6Imh0dHBzOi8vYXNzZXRzLnJibC5tcy81MTk1MzM5MS9vcmlnaW4uanBnIiwiZXhwaXJlc19hdCI6MTc3MzA4MDAzNX0.dBqWSmBdOyyLP-jwPovpNv7ZYQfsQnLiF8tBDZfDO-I/img.jpg?width=980","uploadDate":"2024-04-08T22:37:25Z","url":"https://www.upworthy.com/watching-kids-do-lightning-fast-mental-abacus-math-is-both-mesmerizing-and-mind-blowing?rebelltitem=6#rebelltitem6"}