40+8= 79-5= 18+60= 14-6=
13-4= 8+6= 16-7= 7+8=
32-20= 9+8= 18-9= 16-9+30=
46+40= 67-50= 47+30= 90-50+42=
50+30= 20+45= 72-40= 28-4+5=
20﹣6=
80+18=
3+54=
98﹣60=
75﹣30=
8+60=
32﹣9=
78﹣6=
57+20=
75+9=
26+8=
46﹣40=
45-7-6= 40+30-20= 5+46-7=
54+(14-9)= 32-(13-6)= 63-(14+6)=