1)7/15+23/45=21/45+23/45=44/45
2)1 4/11+5/22=1 8/22+5/22=1 13/22
3)11 5/18-7 1/9=4 5/18-2/18=4 1/6
4)44/45*1 13/22=44/45*35/22=14/9
5)14/9:4 1/6=14/9*6/25=28/75
1)7/15+23/45=21/45+23/45=44/45
2)1 4/11+5/22=1 8/22+5/22=1 13/22
3)11 5/18-7 1/9=4 5/18-2/18=4 1/6
4)44/45*1 13/22=44/45*35/22=14/9
5)14/9:4 1/6=14/9*6/25=28/75