Question

 

Answer 1

a: \(=\dfrac{-6}{15}+1=\dfrac{-2}{5}+1=\dfrac{3}{5}\)

b: =-8*2/3=-16/3

c: \(=\left(\dfrac{7}{16}-\dfrac{6}{16}\right)\cdot2=\dfrac{1}{16}\cdot2=\dfrac{1}{8}\)

Answer 2

\(a,\dfrac{6}{3}.\dfrac{-1}{5}+1=-\dfrac{2}{5}+1=-\dfrac{2}{5}+\dfrac{5}{5}=\dfrac{3}{5}\)

\(b,-8:\dfrac{3}{2}=-8.\dfrac{2}{3}=\dfrac{-8.2}{3}=-\dfrac{16}{3}\)

\(c,\left(\dfrac{7}{16}-\dfrac{3}{8}\right):\dfrac{1}{2}=\left(\dfrac{7}{16}-\dfrac{6}{16}\right).2=\dfrac{1}{16}.2=\dfrac{2}{16}=\dfrac{1}{8}\)

Answer 3

\(a)\)

\(\dfrac{6}{3}\times\dfrac{-1}{5}+1\)

\(=\dfrac{-2}{5}+1\)

\(=\dfrac{3}{5}\)

\(b)\)

\(-8:\dfrac{3}{2}\)

\(=-8\times\dfrac{2}{3}\)

\(=\dfrac{-16}{3}\)

\(c)\)

\(\left(\dfrac{7}{16}-\dfrac{3}{8}\right):\dfrac{1}{2}\)

\(=\left(\dfrac{7}{16}-\dfrac{6}{16}\right):\dfrac{1}{2}\)

\(=\dfrac{1}{16}:\dfrac{1}{2}\)

\(=\dfrac{1}{16}\times\dfrac{2}{1}\)

\(=\dfrac{1}{8}\)