12-3×3=3
27: 3+6=15
50-(14-8)=44
71-9×3=44
27-3×4=15
12-3•3= 12-9= 3;
27: 3+6= 9+6= 15;
50-(14-8)= 50-6= 44;
71-9•3= 71-27= 44;
27-3•4= 27-12= 15;
