把算式补充完整,使之能简算。;G.p'k8S:[7V
1,2.5×l.36×0.4=__.K;^3i*u(P0y2l-J__×(__)d3q(P0U8@-h:f6d__×0.4);G.p'k8S:[7V
2,7.5×0.48+0.48×2.5=(7.5+__*I-N5@8U5_;F)k1a6g*K2K__)×0.48;G.p'k8S:[7V