1.＝10/27+1/27=11/27
2.=10-2/3=28/3
3.=5/7+3/14=(10+3)/14=13/14
14.=5/7+3/14=(10+3)/14=13/14
15.=6*5/6=5
16.=32/5+88/5=120/5=24
17.=155/6-5/6=150/6=25
18.=9/7-2/7+10/21=1+10/21=41/21
19.=10-4=6
20.=5/4+1/2=7/4
21.=16-2/3=46/3
22.=17/32-9/32=8/32=1/4
23.=2/3+1/3=1
24.=3/35+3/7=(15+3)/35=18/35
25.=2/14+1/6=14/42+7/42=21/42=1/2
26.=2/15+5/6=4/30+25/30=29/30
27.=9/22+4/22=13/22
28.=11/3+4/3=15/3=5
29.=20+5=25
30.=7/19+10/19=17/19