7/18×8/9+7/18÷9
问题描述:
7/18×8/9+7/18÷9
答
=56/(18×9)+7/(18×9)
=63/(18×9)
=7/18
7/18×8/9+7/18÷9
=56/(18×9)+7/(18×9)
=63/(18×9)
=7/18