Respuesta :

mkneadler
9.57 - 7.1 = 2.47
9.57 - 2.47 = 7.1
2.47 + 7.1 = 9.57
7.1 + 2.47 = 9.57
7.1+2.47=9.57
2.47+7.1=9.57
9.57-7.1=2.47
9.57-2.47=7.1

Dunno if the second addition counts, but technically it's different.