停车场上有45辆车，到了中午少了30辆。停车场还有几辆车？9w,n0W7x6a:k-N;n,n2N+n.I)H6}._0X
算式：提示.m.e;L/T;B*Q:F(a*J)I0^7t8Y8?9w,n0W7x6a:k-N;n,n2N+n.I)H6}._0X
口答：停车场还有*d.b+d2Q,i5Y'|/w(u*`6[辆车。9w,n0W7x6a:k-N;n,n2N+n.I)H6}._0X