Пошаговое объяснение:
3) -16÷1 11/13+1 1/4÷(-15/38)= -11 5/6
- -16÷1 11/13= -16÷24/13= -16×13/24= -26/3
- 1 1/4÷(-15/38)=5/4×(-38/15)= -19/6
- -26/3+(-19/6)= -52/6-19/6= -71/6= -11 5/6
4)(-8-1 3/13÷(-1 17/39)÷(-5 5/14)=1 1/3
- -1 3/13÷(-1 17/39)= -16/13÷(-56/39)= -16/13×(-39/56)=6/7
- -8+6/7= -56/7+6/7= -50/7
- -50/7÷(-5 5/14)= -50/7÷(-75/14)= -50/7×(-14/75)=4/3=1 1/3