简算(90+1/88)*1/98

问题描述:

简算(90+1/88)*1/98

(90+1/88)*1/98应该是(90+1/88)*1/89吧
(90+1/88)*1/89
=(89+1+1/88)*1/89
=(89+89/88)*1/89
=89*(1+1/88)*1/89
=1+1/88
=89/88