现在在教国小五年级的四则运算 碰到一点问题想请教一下大家 就是 例如 72÷8÷9=72÷(8×9) 在做基本运算的时候都知道括弧拿到要将÷变号成为× 但是要如果解释给学生听呢？ 我的想法是告诉他们 因为72要÷8也要÷9 所以可以先将8和9相乘，再去÷72 又怕他们听不懂 所以想问问大家是如何解释的 谢谢罗 :) -- *~Most of time you have Viggo, something amazing is not too far behind. He's like an old-fashioned movie star in my eyes, very gentleman, and very polite, you know, *very* concerntrated in his own. In a word, I would say, I would describe Viggo as being very inspiring.~* --Dom --

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