4分之3加9分之7减8分之5减9分之1 能简便就简便吧
4分之3加9分之7减8分之5减9分之1 能简便就简便吧
数学人气:634 ℃时间:2019-11-18 07:16:14
优质解答
原式=(7/9-1/9)+(6/8-5/8)
=2/3+1/8
=16/24+3/24
=19/24
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