一瓶酱油3元,小红买了5瓶酱油,需要多少钱?付给售货员20元钱,应找回多少元?'x.K+V)W)S+N)`+G)f3V2b(U8[
算式:提示7u0F'm-D6T-?+i2o+U0\;T6y7_8_5X'x.K+V)W)S+N)`+G)f3V2b(U8[
答:需要0x*M2@*s;t3E*l;@([,A.h元。'x.K+V)W)S+N)`+G)f3V2b(U8[
算式:提示1@2P3a2b5v3y+e;A.f'x.K+V)W)S+N)`+G)f3V2b(U8[
答:应找回:h.m3M3^*\6v,}8W:D元。'x.K+V)W)S+N)`+G)f3V2b(U8[