Пошаговое объяснение:
3 2/3+1 1/6= 3 4/6+1 1/6=4 5/6
8 4/7+5 7/9=8 36/63+ 5 49/63=13 83/63=13 20/63
4 7/15+3 1/20=4 28/60+ 3 3/60=7 31/60
7-4 5/9= 2 4/9
9 5/7 - 2 3/14= 9 10/14 - 2 3/14=7 7/14= 7 1/2
6 3/7 - 1 7/9=6 27/63 -1 49/63 = 5 90/63 - 1 49/63=4 41/63
15,1 - 6 4/5= 15,1 - 6,8= 8,3
