62-850 24-618 5元50角
47-247-9 76-3749 4元3角3元4角
11-7= 13-5= 72+8= 30-3=
12-3= 14-8= 41-2= 21-6=
9+9-8= 19-10+8= 18-8-6= 3+8-7=
有个 。