\(1000000000:10=100000000\)

\(\dfrac{1}{8}< \dfrac{x}{40}< \dfrac{1}{5}\\ \Rightarrow\dfrac{5}{40}< \dfrac{x}{40}< \dfrac{8}{40}\\ \Rightarrow x=\left\{6,7\right\}\)

\(10,27-18,08=10,27+\left(-18,08\right)=-7,81\)

\(\left(-11,2\right)\times5,4+100-5,4\times\left(-1,2\right)\\ =-60,48+100-\left(-6,48\right)\\ =-60,48+100+6,48\\ =39,53+6,48\\ =46\)

\(\left(-25,19\right)-\left(74,81-17,4\right)\\ =\left(-25,19\right)-57,41\\ =\left(-25,19\right)+\left(-57,41\right)\\ =-82,6\)

\(a,0,5=\dfrac{1}{2}\\ b,12,50=\dfrac{25}{2}\\ c,2,66=\dfrac{133}{50}\\ d,0,0125=\dfrac{1}{80}\)

\(3,014\times\left(-23,68\right)-3,014+3,014\times75,32\\ =3,014\times\left(-23,68\right)-3,014\times1+3,014\times75,32\\ =3,014\times\left(-23,68-1+75,32\right)\\ =3,014\times50,64\\ =152,62896\)

\(15\times\left(-0,75\right)\times0,8\\ =-11,25\times0,8\\ =-9\)

\(\left(2,07-7,005\right)-\left(12,005-4,23\right)\\ =-4,935-7,775\\ =-4,935+\left(-7,775\right)\\ =-12,71\)

\(\dfrac{-3}{5}-\left(\dfrac{-19}{24}\right)+\dfrac{-7}{24}\\ =\dfrac{-3}{5}+\dfrac{19}{24}+\dfrac{-7}{24}\\ =\dfrac{-3}{5}+\left(\dfrac{19}{24}+\dfrac{-7}{24}\right)\\ =\dfrac{-3}{5}+\dfrac{1}{2}\\ =\dfrac{-6}{10}+\dfrac{5}{10}\\ =\dfrac{-1}{10}\)