вичислете 5/7 +1/4
7/15-3/10
11/18-4/9
7/30+9/20
11/16-5/12
5/8+4/27
19/42-3/28
8/9-5/6+1/3
9/16+5/6-7/24

5,7+1,4=7,1; 7,15-3,10=4,05; 11,18-4,9=6,28; 7,30+9,20=16,50; 11,16-5,12=6,04; 5,8+4,27=10,07; 19,42-3,28=16,14; 8,9-5,6+1,3=4,6; 9,16+5,6-7,24=7,52