90-9=
98-70=
65+20=
86-5=
4+65=
20+67=
73-40=
85-7=
76-60=
24-10=
56+20-8=
33+8-40=
35-6+30=
24-(17-8)=
6+(87-30)=
80-7+20=
8+43+9=
15+(22+8)=
3+40+9=
76-70+56=
37+(17-8)=
81-8+20=
A.6+6
B.2+6
C.6×6