номер 1:
1)1 – 7/8 = 1/8
2)1 – 9/10 = 1/10
3)1 – 11/20 = 9/20
4)2 – 5/8 = 1 3/8
5)6 – 4/5 = 5 1/5
6)8 – 3/4 = 7 1/4
номер 2:
(3/16 + 5/12) – 3/5 = 1/240
надеюсь
