27-9=
18
23+23=
46
1x1=
1
32/2=
64-32
32
34+79=
103
4x4=
16
200/100=
2
120-60=
60
32+23=
55
8x8=
56-7=
49
70+90=
160
9x10=
90
100-99-2=
negative 1
189+356=
545
9x3=
27