решите дроби 9 7/13-5 9/13, 15-19/25,7-26/43,18-11 5/7,6-2 4/23,21-8/18​

9 7/13-5 9/13=8 20/13-5 9/13=3 11/13

15-19/25=14 25/25-19/25=14 6/25

7-26/43=6 43/43-26/43=6 17/23

18-11 5/7=17 17/7-11 5/7=6 2/7

6-2 4/23=5 -2 4/23=3 19/23

21-8/18=20 18/18-8/18=20 10/18=20 5/9