Question

tính nhanh

Answer 1

\(2\cdot\dfrac{3}{7}+\left(\dfrac{2}{9}-1\dfrac{3}{7}\right)-\dfrac{5}{3}:\dfrac{1}{9}=\dfrac{6}{7}+\left(\dfrac{2}{9}-\dfrac{10}{7}\right)-15=\dfrac{6}{7}+\left(-\dfrac{76}{63}\right)-15=-\dfrac{22}{63}-15=-\dfrac{967}{63}\)

Answer 2

b,

\(2\cdot\dfrac{3}{7}+\left(\dfrac{2}{9}-1\dfrac{3}{7}\right)-\dfrac{5}{3}:\dfrac{1}{9}\)

\(=\dfrac{6}{7}+\left(\dfrac{2}{9}-\dfrac{10}{7}\right)-15\)

\(=\dfrac{6}{7}-\dfrac{76}{63}-15\)

\(=-\dfrac{815}{63}\)