arabera DEISY MABEL GUERRERO ARIZA 9 years ago
4516
Honelako gehiago
by Jesus Cruz
by LEON MENDOZA LEON MENDOZA
by Joselyne Gomez Quimi
by Keyly Alvarez Rangel
a + 0 = a b + 0 = b c + 0 = c
a + b = c y b+ a = c
(a + b) + c = a + (b + c)