家长会邀请了56位家长，有7位未到。-r2m4v.v+i3R+M
（1）实际来了多少位家长？-r2m4v.v+i3R+M
算式：提示'X,C*H4|-X9Y'[+D-r2m4v.v+i3R+M
答：实际来了0C-d,y8K's4C5K*u+U*g-M'e;]位家长。-r2m4v.v+i3R+M
（2）中途有2位家长离开，现在还剩多少位家长？-r2m4v.v+i3R+M
算式：提示.U+\:`;z1J0G6x8o0O;|6{-r2m4v.v+i3R+M
答：现在还剩1C*r5^1B位家长。-r2m4v.v+i3R+M