Вычесли: 1-(2/7+3/14); 1-(5/24+3/8); (1/4-5/24)+9/16; №/4-(3/16+1/24).

 1-(2/7+3/14)=1-(4/14+3/14)=1-7/14=1-1/2=1/2=0.5
1-(5/24+3/8)=1-(5/24+9/24)=1-14/24=1-7/12=5/12
(1/4-5/24)+9/16= (12/48-10/48)+27/48=2/48+27/48=29/48
3/4-(3/16+1/24)=36/48-(9/48+2/48)= 36/48-11/48=25/48