a |-----|
b |-----|-----| } 12.
12 : 3 = 4 (a)
4 x 2 = 8 (b)
Verificare : 4 +8 = 12.
a |-----|
b |-----|-----|-----| } 12.
12 : 4 = 3 (a)
3 x 3 = 9 (b)
Verificare : 3 + 9 = 12 .
a |-----|
b |-----|-----|-----|-----|-----| } 12.
12 : 6 = 2 (a)
2 x 5 = 10 (b)
Verificare : 2 +10 = 12.