Question

Calculati a+b-c daca: a=3,4(5) + 4,5(6), b=$\frac{49}{90}$ + $\frac{8}{10}$ - $\frac{2}{9}$ si c=4+$\frac{15}{90}$.

Answer 1

b=1,1(2)
a=8,0(2)
c=4,1(6)
a+b-c= 4,9(7)