Considere as afirmativas abaixo:
I. 268+1068=268+(2×5)68=268+268×568=468×568=2068
II. 268+1068=268+(2×5)68=268+268×568=2136×568
III. 717+1023=(2×3)17+(2×5)23=217×317+223×523=(217×223)+(317×523)
Pode-se afirmar que: