Răspuns :
9 / 9 + 3 / 9 =
= 12/9
= 4 / 3
_________________________
16 / 8 - 6 / 8 =
= 10 / 8
= 5 / 4
= 12/9
= 4 / 3
_________________________
16 / 8 - 6 / 8 =
= 10 / 8
= 5 / 4