赶紧别耽误了,好好培养,真有数学天赋
回答: 举个例子,他妈问他2(1÷2)是什么意思,他拿起三个苹果,吧其中一个一刀两半,拿走其中一半,指着盘子说:这就是2又1/2 ···
由 michaelg
于 2017-11-03 19:07:08
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