803:
а)7*3/3*14= 21/42= 3/6; б)10*11*9/12*10*11=990/1320=99/132= 33/44= 3/4;
10*9/30*9= 90/270= 9/27= 1/3; 12*14*16/14*16*18= 12/18= 4/6= 2/3;
в)4*12/5*9=48/45=16/15; г)5*9/6*7*30= 1*3/2*7*6= 1/2*7*2= 1/28;
14*15/21*20=210/420= 21/42=1/2; 3*4*25/24*15= 3*1*5/6*3= 1*5/6*3= 5/18.
804:
а)2*27*11/4*3*5*121= 1*9*1/2*1*5*11= 9/110; б)8*9*5*2401/4*27*16807= 2*1*5*1/1*3*7= 2*5/3*7=
=10/21.