87-15=
7+63=
17+30=
56-20=
59+6=
37+22=
20+30=
56- 16=
38+4=
87-30=
( )
20+6= 85+3= 2+38=
65+20= 96-50= 81-9=
52-22= 80-50-30= 32+20-2=
96-60= 96-6= 96-66= 32+58= 51-41=
4+77= 25-12= 21+40= 73-40= 83-62=