(1)(-1)的5次方×{[-4又3分之2÷(-2)²+(-12.5)×(-0.4)]÷(-9分之1)-3²}

问题描述:

(1)(-1)的5次方×{[-4又3分之2÷(-2)²+(-12.5)×(-0.4)]÷(-9分之1)-3²}

(1)(-1)的5次方×{[-4又3分之2÷(-2)²+(-12.5)×(-0.4)]÷(-9分之1)-3²}=-1×{[-(14/3)÷4+(25/2)×(2/5)]*(-9)-9}=-1×{[-7/6+5]*(-9)-9}=(-7/6+5)*9+9=(-7/6+5+1)*9=(5/6)*9=15/2...