0.84÷14﹢0.84×14分之13怎么简便计算
问题描述：
0.84÷14﹢0.84×14分之13怎么简便计算
答
0.84÷14﹢0.84×13/14
=0.84x1/14+0.84×13/14
=0.84x(1/14+13/14)
=0.84x1
=0.84