(90+1/88)*1/89怎么简便计算啊

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(90+1/88)*1/89怎么简便计算啊(90+1/88)*1/89怎么简便计算啊(90+1/88)*1/89怎么简便计算啊(90+1/88)*1/89=(89+1+1/88)*1/89=89*1/

(90+1/88)*1/89怎么简便计算啊
(90+1/88)*1/89怎么简便计算啊

(90+1/88)*1/89怎么简便计算啊
(90+1/88)*1/89
=(89+1+1/88)*1/89
=89*1/89+89/88*1/89
=1+1/88
=89/88

(90+1/88)×1/89
=(89+1+1/88)×1/89
=(89+89/88)×1/89
=89×1/89+89/88×1/89
=1+1/88
=89/88

原式=(89+1+1/88)*1/89=(89+89/88)/89=1+1/88=89/88

(90+1/88)*1/89
=(90+1/88+1-1)*1/89
=(89+89/88)*1/89
=1+1/88
=89/88