9/14-3/7+15/28=18/28-12/27+15/28=21/28
1/6+1/4+1/8=4+6+3/24=13/24
13/18-29/45+8/15=65-58+48/90=55/90
1. 3/4.
2. 13/24.
3. 11/18
9/14-3/7+15/28=18/28-12/27+15/28=21/28
1/6+1/4+1/8=4+6+3/24=13/24
13/18-29/45+8/15=65-58+48/90=55/90
1. 3/4.
2. 13/24.
3. 11/18