Пошаговое объяснение:
1. (3/22 +2/11)·2=(3/22 +4/22)·2=7/22 ·2=7/11
2. 3/5 -1 2/3=9/15 -1 10/15=-1 1/15
3. (4/9 -11/15 +2/3)÷3 2/5+2/9=1/3
3.1. 4/9 -11/15 +2/3=20/45 -33/45 +30/45=17/45
3.2. 17/45 ÷3 2/5=17/45 ·5/17=1/9
3.3. 1/9 +2/9=3/9=1/3
