Question

(-6/7+ 3/5):13/17+(2/5-5/9):13/17
là phân số nha

Mình cần trong 45 phút nx gấppp

_Cảm ơn_

Answer 1

\(\left(\dfrac{-6}{7}+\dfrac{3}{5}\right):\dfrac{13}{17}+\left(\dfrac{2}{5}-\dfrac{5}{9}\right):\dfrac{13}{17}.\\ =\left(\dfrac{-6}{7}+\dfrac{3}{5}+\dfrac{2}{5}-\dfrac{5}{9}\right):\dfrac{13}{17}.\\ =-\dfrac{26}{63}.\dfrac{17}{13}=-\dfrac{34}{63}.\)

Answer 2

\(=\left(\dfrac{-6.5+3.7}{35}\right):\dfrac{13}{17}+\left(\dfrac{2.9-5.5}{45}\right):\dfrac{13}{17}=\dfrac{-9}{35}:\dfrac{13}{17}+\left(-\dfrac{7}{45}\right):\dfrac{13}{17}=\left(-\dfrac{9}{35}-\dfrac{7}{45}\right):\dfrac{13}{17}=\left(-\dfrac{26}{63}\right):\dfrac{13}{17}=\left(-\dfrac{26}{63}\right).\dfrac{17}{13}=-\dfrac{34}{63}\)