91-13=
91-78=
100-34=
90-45=
16×6-6=
96-32÷16=
90-3×13=
90-55=
90-35=
32+3×20=
120÷40+20=
(170+40)÷30=
30-12=
180-72=
32+3-20=
180-36-44=
(95-20)÷25=
80-29=
180-50=
56-7×8=
40×(38+12)=
350÷(50+20)=
60-35=
90-33=
56÷7×8=
160-(95-15)=
72÷(12×3)=
50-27=
180-107=
17×3+20=
810÷(5×18)=
28+56÷28=
80-16=
180-112=
78-12×4=
70+30×2=
50-20÷5=
100-23=
360-170=
40-7×4=