Question

Tình giá trị biểu thức (6/7+3/14):3/7x1/70

Answer 1

\(\left(\dfrac{6}{7}+\dfrac{3}{14}\right):\dfrac{3}{7}\times\dfrac{1}{70}\)

\(=\left(\dfrac{12}{14}+\dfrac{3}{14}\right):\dfrac{3}{7}\times\dfrac{1}{70}\)

\(=\dfrac{15}{14}:\dfrac{3}{7}\times\dfrac{1}{70}\)

\(=\dfrac{15}{14}\times\dfrac{7}{3}\times\dfrac{1}{70}\)

\(=\dfrac{15\times7\times1}{14\times3\times70}\)

\(=\dfrac{105}{2940}=\dfrac{1}{28}\)

Answer 2

\(\left(\dfrac{6}{7}+\dfrac{3}{14}\right):\dfrac{3}{7}\times\dfrac{1}{70}\)

\(=\left(\dfrac{12}{14}+\dfrac{3}{14}\right)\times\dfrac{7}{3}\times\dfrac{1}{70}\)

\(=\dfrac{15}{14}\times\dfrac{1}{30}\)

\(=\dfrac{1}{28}\)