вычеслите .754, упр

решение:
1) 3/ (1-1/2)= 3/(1/2)=6
2)(1-1/4)/ (1,1/2)= 3/4: 3/2=1/2
3)(2/3+1/4)/(1,5/6)= 11/12 : 11/6= 1/2
4)(8,1/3)/(8/9-1/3)= 25/3 : 5/9= 5•3=15