a : 8 = c r ( r =c ; r < 8 )
Conform t.i.r. ==>
==>a = 8×c + r = 9 × r
Stiind ca r < 8,a > 8 atunci restul poate fi:
{1; 2; 3; 4; 5; 6; 7}
si a = { 9; 18; 27; 36; 45; 54; 63}
9 : 8 = 1 rest 1
18 : 8 = 2 rest 2
27 : 8 = 3 rest 3
36 : 8 = 4 rest 4
54 : 8 = 6 rest 6
63 : 8 = 7 rest 7
