========================================= 0,8
5/20 - 1/4 - 0.25
8/68 - 2/17
16/80 - 1/5 - 0.2
4/24 - 1/6
3/90 - 1/30
15/60 - 1/4 - 0.25
8/52 - 2/13
18/54 - 1/3
14/77 - 2/11
10/60 - 1/6
12/78 - 2/13
6/102 - 1/17
12/42 - 2/7
3/12 - 1/4
-2с • (-0,1d)•5 = 0,2 cd • 5 = cd
2 целых 4/15 + 1 целая 23/30 =2 целых 8/30 + 1 целая 23/30 =3 31/30=4 1/30
А) 3/8+5/16 = 6/16 + 5/16 = 11/16
б) 5/18 + 2/9 = 5/18 + 4/18 = 9/18
в) 4/7 + 3/14 = 8/14 + 3/14 = 11/14
г) 7/100 + 3/10 = 7/100 + 30/100 = 37/100