a -----------------
b ----------------- ----
c ------------------ ---- -----
d ------------------ ---- ----- -----
e ------------------ ----- ----- ----- -----
f -------------------- ----- ----- ----- ----- -----
segmentele in plus valoreaza 1
. egalam partile
75 -15 segmente egale = 60
. cat este a?
60:6=10
cat este b?
10+1=11
c?
11+1=12
d?
12+1=13
e?
13+1=14
f?
14+1=15