arabera DEISY MABEL GUERRERO ARIZA 9 years ago
4581
Honelako gehiago
by SONIA YANETH FAJARDO OROZCO
by Michelle Carce
by Brenda Mejía
by anderson camilo vallejo lasso
a + 0 = a b + 0 = b c + 0 = c
a + b = c y b+ a = c
(a + b) + c = a + (b + c)