1支钢笔6.2元,1支圆珠笔1.8元。买钢笔12支、圆珠笔15支,付了110元,应找回多少元?4R(`.R(G2Y
算式:提示1j5k6b:@3l)g*p4R(`.R(G2Y
答:应找回0@9M1^;[7h/|8C元。4R(`.R(G2Y