44+33=
27+12=
47-25=
92-81=
41+48=
88-38=
85-40=
20+80=
59-50=
37+13=
50-7=
45-6=
5+37=
78+20=
38+9=
28-9+40=
45-40+32=
28-10+9=
25+9-6=