a + b = 876
a : b = 8 rest 3
a = 8×b+3 (conform teoremei impartirii cu rest)
a /----/----/----/----/----/----/----/----/+3
b /----/
8 segmente egale+3 + 1 segment egal = 9 segmente egale+3 = 876
876 - 3= 873
873 : 9 = 97 (valoarea unui segment egal)
a = 8 × 97 +3 = 776+3 = 779
b = 97
Verificam:
779 + 97 = 876