英朗收音机按键说明:帮帮我,解道计算
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[1-(13/3-7/4)*2]/5/2
[1-(13/3-7/4)*2]/5/2
=[1-(13/3-7/4)*2]*2/5
=2/5-4/5(13/3-7/4)
=2/5-52/15+7/5
=(6-52+21)/15
=-5/3
*是乘吗?
乘的话是-5/3
-5/12
[1-(13/3-7/4)*2]/5/2
=[1-(13/3-7/4)*2]*2/5
=2/5-4/5(13/3-7/4)
=2/5-52/15+7/5
=(6-52+21)/15
=-5/3
*是乘吗?
乘的话是-5/3
-5/12