1) 8/11+3/22=16/22+3/22=19/22
2) 19/22:5/11=19/22*11/5=19/10= 1целая 9/10=1,9
1)7/12-5/9=21/36-20/36=1/36
2)17/36:1/36=(17*36):(36*1)=17
1)3/16=9/48
5/24=10/48
9/48+10/48=19/48
19/24=38/48
38/48:19/48=38*48/19*48=2/1=2
208,209,210,211,212,213,214
38% - 15% + 289% - 281 = 31% - останется вместе