停车场有7辆，先开走了3辆，又开走了2 辆，停车场还剩几辆？1s,r(D(L+z'O
算式：提示2q;o-P8I*t1D.Z.C)d;n1s,r(D(L+z'O
答：停车场还剩6D9U:K*M'w+m7h(h.y1|7C1S.M*B-R2U辆。1s,r(D(L+z'O