\(a,-\dfrac{6}{18}+\dfrac{18}{27}=-\dfrac{1}{3}+\dfrac{2}{3}=\dfrac{-1+2}{3}=\dfrac{1}{3}\\ b,2,5-\left(-\dfrac{6}{9}\right)=\dfrac{5}{2}+\dfrac{2}{3}=\dfrac{5\times3+2\times2}{6}=\dfrac{19}{6}\\ c,-0,32\times\left(-0,875\right)=-\dfrac{8}{25}\times\left(-\dfrac{7}{8}\right)=\dfrac{8\times7}{25\times8}=\dfrac{7}{25}\\ d,\left(-5\right):2\dfrac{1}{5}=\left(-5\right):\dfrac{11}{5}=-5\times\dfrac{5}{11}=-\dfrac{25}{11}\)
`-6/18 + 18/27= -1/3+ 2/3= 1/3`
`2,5 -(-6/9)=5/2 + 2/3= 15/6 + 4/6= 19/6`
`-0,32 .(-0,875)= 0,28`
`(-5) : 2 1/5= -5 : 11/5= -5 xx 5/11= -25/11`
\(a,-\dfrac{6}{18}+\dfrac{18}{27}=\dfrac{1}{3}\)
\(b,2,5-\left(-\dfrac{6}{9}\right)=2,5+\dfrac{6}{9}=\dfrac{19}{6}\)
\(c,-0,32.\left(-0,875\right)=0,28\)
\(d,\left(-5\right)\div2\dfrac{1}{5}=\left(-5\right)\div\dfrac{11}{5}=\left(-5\right).\dfrac{5}{11}=-\dfrac{25}{11}\)
a)\(\dfrac{-6}{18}+\dfrac{18}{27}=\dfrac{1}{3}\)
\(2,5-\left(-\dfrac{6}{9}\right)=\dfrac{19}{6}\)
\(-0,32.\left(-0.875\right)=0,28\)
\(-5:2\dfrac{1}{5}=\dfrac{25}{11}\)
