29﹣9=
77﹣70=
62+6=
17﹣9+21=
87﹣7=
13﹣8=
20+30=
18﹣9+2=
37﹣30=
53﹣3=
2+22=
15﹣6+7=
60﹣30=
10+80=
5+42=
56﹣6+5=