用简便方法计算下列各题:(90+1/88)*1/89
问题描述:
用简便方法计算下列各题:(90+1/88)*1/89
答
(90+1/88)*1/89
=(89+89/88)*1/89
=89*1/89+89/88*1/89
=1+1/88
=89/88