11分之8-(11分之7+8分之3)/9分之7+10分之3-9分之2+10分之17这两个怎么计算
2018-06-21
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8/11-(7/11+3/8)
=8/11-7/11-3/8
=1/11-3/8
=-25/88
,
7/9+3/10-2/9+17/10
=(7/9-2/9)+(3/10+17/10)
=5/9+2
=2又5/9
=8/11-7/11-3/8
=1/11-3/8
=-25/88
,
7/9+3/10-2/9+17/10
=(7/9-2/9)+(3/10+17/10)
=5/9+2
=2又5/9
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