商店有7盒钢笔，每盒8支，卖了28支，还剩多少支？1p0i6~7y0}3?-K4L
算式：提示-i:g/X5i1h1p0i6~7y0}3?-K4L
答：还剩)Q7~.Q3E6K6t*u;v0\/w'k2t6h支。1p0i6~7y0}3?-K4L