Răspuns :
a |-----|
b |-----|+1|
c |-----|+1|+1| } 21.
21 - 3 = 18 ( 3 segmente egale)
18 : 3 = 6 (a)
6 + 1 = 7 (b)
6 + 1 + 1 = 8 (c)
Verificare : 6 + 7 + 8 = 21
b |-----|+1|
c |-----|+1|+1| } 21.
21 - 3 = 18 ( 3 segmente egale)
18 : 3 = 6 (a)
6 + 1 = 7 (b)
6 + 1 + 1 = 8 (c)
Verificare : 6 + 7 + 8 = 21