新学期开学，妈妈给小明买书包花了54元、买铅笔盒花了15元、.o0s(h5@,T+Q:o.B4q-U1P(W/`*?
买蜡笔花了18元，三样物品一共花了多少元钱？.o0s(h5@,T+Q:o.B4q-U1P(W/`*?
算式：提示)K-c+w;j)`)B2?.r6k-c.U(v.o0s(h5@,T+Q:o.B4q-U1P(W/`*?
答；三样物品一共花了,o'd7^8]2L0v9?;h元钱。.o0s(h5@,T+Q:o.B4q-U1P(W/`*?