[1(1/4+3/8)]/1/4 105*3/4+207*0.75-112/1 1/3
[1(1/4+3/8)]/1/4 105*3/4+207*0.75-112/1 1/3
= =
[1/2-(3/4-3/5)]/7/10 [(1/2+2/3)*3/4-1/6]/1/5
= =
参考答案:<1>==16/347
<2>==17/131
[1(1/4+3/8)]/1/4 105*3/4+207*0.75-112/1 1/3
= =
[1/2-(3/4-3/5)]/7/10 [(1/2+2/3)*3/4-1/6]/1/5
= =
参考答案:<1>==16/347
<2>==17/131