100×2/101简便
问题描述：
100×2/101简便
答
100*2/101
=（101-1）*2/101
=101*2/101-1*2/101
=2-2/101
=202/101-2/101
=200/101
=1又99/101
答
=(101-1)×2/101
=101×2/101-1×2/101
=2-2/101
=1又99/101