Răspuns :
72:6=9 rest 18
6X9+18=72
81:8=9 rest 9
8X9+9=81
64:5=9 rest 19
5X9+19=64
36:4=9 rest 0
4X9=36
64:7=9 rest 1
9X7+1=64
6X9+18=72
81:8=9 rest 9
8X9+9=81
64:5=9 rest 19
5X9+19=64
36:4=9 rest 0
4X9=36
64:7=9 rest 1
9X7+1=64
72:6=9 rest 18
6X9+18=72
81:8=9 rest 9
8X9+9=81
64:5=9 rest 19
5X9+19=64
36:4=9 rest 0
4X9=36
64:7=9 rest 1
9X7+1=64