3.5*0.125+5又2分之1*8分之1-12.5%
问题描述：
3.5*0.125+5又2分之1*8分之1-12.5%
答
3.5×0.125+5又2分之1×8分之1-12.5%
=3.5×0.125+5.5×0.125-0.125
=(3.5+5.5-1)×0.125
=8×0.125
=1
明白请采纳,
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