Question

Caluculati
1 supra 2 + 2 supra 3
3 supra 5 + 4 supra 3
1 supra 9 + 7 supra 8
2 supra 11 + 3 supra 10

Answer 1

1\2+2\3=3\6+4\6=7\6
1\9+1\8=8\72+9\72=17\72
2\11+3\10=20\110+33\110=53\110