Want to calculate crazy math problems in your head?
你想心算那些疯狂的数学题吗？
Now imagine your friend is in the passenger's seat asking you about math problems.
再想像你的朋友坐在乘客座位上，问你关于数学的问题。
Post math problems and see if any of your relatives can answer them.
将一些数学题传到网上，然后看看你哪个亲朋好友可以回答。
Do math problems in your head instead of on a calculator.
心算而不是用计算器计算。
Do math problems in your head instead of on a calculator.
心算而不是用计算器计算。
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