Question

Выполните действия 3/8+1/8;9/11+7/11;20/21+16/21;5/9+2/9;710/-3/10;37/80-980;7/25-225;11/15-1/15+2/15.​

Answer 1

3/8+1/8=4/8=1/2=0,5

9/11+7/11=16/11=1 5/11

20/21+16/21=36/21=12/7=1 5/7

5/9+2/9=7/9

710/-3/10=-23,(6)

37/80-980=-979 43/80

7/25-225=-224 18/25

11/15-1/15+2/15=0,8