Răspuns :
3/7=1/7+1/7
3/7=2/7+1/7
3/7=3/7+0/7
3/7=1/7+1/7+1/7
11/15=10/15+1/15,
5/15+6/15,1/15+10/15 sunt multe modalitati.
3/7=2/7+1/7
3/7=3/7+0/7
3/7=1/7+1/7+1/7
11/15=10/15+1/15,
5/15+6/15,1/15+10/15 sunt multe modalitati.