Răspuns :
37/7-9/7=28/7=4
37/7-16/7=21/7=3
37/7-23/7=14/7=2
30/7-23/7=7/7=1
30/7-16/7=14/7=2
30/7-9/7=21/7=3
23/7-16/7=7/7=1
23/7-9/7=14/7=2
16/7-9/7=7/7=1
37/7-16/7=21/7=3
37/7-23/7=14/7=2
30/7-23/7=7/7=1
30/7-16/7=14/7=2
30/7-9/7=21/7=3
23/7-16/7=7/7=1
23/7-9/7=14/7=2
16/7-9/7=7/7=1