【求助】一道数学思考题的解题思路

tianqunping

一个两位数，用2去除，所得的商正好是这个两位数个位的数与十位上的数的和。这个两位数是多少？虽然儿子蒙对了答案，可是我想不出思路是怎么来的，求教大家

tianqunping

<img src="http://www.etjy.com/images/smiles/sob.gif" border="0" onclick="javascript:window.open(this.src);" alt= style="CURSOR: pointer" onload="javascript:if(this.width>screen.width-500)this.style.width=screen.width-500;" />没人会还是没人答？

wumin

10XA+B=2XC(A.B为1--9的整数) A+B=C

魔王

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tlih

(10X+Y)/2=X+Y5X+Y/2=X+Y4X=Y/28X=YX=1Y=8这个数是18

魔王

楼上解法也没有问题，看小孩学过代数没有。

Ariel

魔王的解法低年级小朋友能看懂.高的!

魔王

主要是我儿子才读一年级。

ddfs

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ddfs

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