arabera DEISY MABEL GUERRERO ARIZA 10 years ago
4708
Honelako gehiago
by jofran sangronis
by Maria Paula Garcia Forero
by Vicente Lavandero Ivelic
by Mardelys Querales
a + 0 = a b + 0 = b c + 0 = c
a + b = c y b+ a = c
(a + b) + c = a + (b + c)