7.6÷4+2.4×0.25=7.6×0.25+2.4×0.25=(7.6+2.4)×0.25=10×0.25=2.5原题是不是错了 多了一个2
=7.6*(1/4)+2.4*(1/4)=(7.6+2.4)*(1/4)=2.5
7.6÷4＋2.4×0.25=7.6*0.25+2.4*0.25=0.25*(7.6+2.4)=0.25*10=2.5望采纳！！！
