А) =3/6+2/6=5/6
Б)=5/20+8/20=13/20
В)=8/12+3/12=11/12
Г)=15/20+8/20=23/20=1 3/20
Д)=30/42-7/42=25/42
Е)=9/12-4/12=5/12
Ж)=1/8+2/8=3/8
З)=6/9-5/9=1/9
И)=6/12-5/12=1/12
К)=15/36-8/36=7/36
Л)=3/24+14/24=17/24
М)=9/12-2/12=7/12
Н)=20/36+27/36=47/36=1 11/36
О)=23/40-15/40=8/40=1/5
П)=36/140-15/140=21/140=3/20