1 1/9+2,75+1/3=10/9+275/100+1/3=10/9+11/4+1/3=40/36+99/36+12/36=151/36=
=4 7/36
3,5+5 1/7-2 3/14=35/10+36/7-31/14=7/2+36/7-31/14=49/14+72/14-31/14=89/14=
=6 5/14
8,5+5/6-6,25=85/10+5/6-625/100=17/2+5/6-25/4=102/12+10/12-75/12=37/12=
=3 1/12
76/10-14/3+11/5=228/30-140/30+66/30=154/30=5 4/30=5 2/15
225/100+166/15-43/6=9/4+166/15-43/6=135/60+664/60-430/60=369/60=6 9/60=6 3/20
68/10-7/3+12/10=204/30-70/30+36/30=170/30=17/3=5 2/3
легко