中国 Math 教育

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https://www.youtube.com/watch?v=2v08t3fFQQw

https://www.youtube.com/watch?v=U2TPnF44Y-w

When adding numbers, it is easier to add largest to smallest, rather than smallest to largest. Again, doing calculation from left to right is easier because that's the way we read numbers. Also it gives you better estimation. These ads are  popped up when I am watching the secret of Mental Math.

中国数学教育不仅反其道而行，而且纯粹死记公式。