Question

\(\dfrac{3}{5}\):\(\left(\dfrac{-1}{15}-\dfrac{-1}{6}\right)\)+\(\dfrac{3}{5}\):\(\left(\dfrac{-1}{3}-\dfrac{16}{15}\right)\)

Cứu tui vs!!

Answer 1

`#3107.101107`

`3/5 \div (-1/15-1/6) + 3/5 \div (-1/3-16/15)`

`= 3/5 \div 1/10 + 3/5 \div (-7/5)`

`= 3/5 \times 10 + 3/5 \times (-5/7)`

`= 3/5 \times (10 - 5/7)`

`= 3/5 \times 65/7 = 39/7`

Answer 2

\(\dfrac{3}{5}:\left(\dfrac{-1}{15}-\dfrac{-1}{6}\right)+\dfrac{3}{5}:\left(\dfrac{-1}{3}-\dfrac{16}{15}\right)\\ =\dfrac{3}{5}:\left(\dfrac{-1}{15}+\dfrac{1}{6}\right)+\dfrac{3}{5}:\left(\dfrac{-5}{15}-\dfrac{16}{15}\right)\\ =\dfrac{3}{5}:\left(\dfrac{-2}{30}+\dfrac{5}{30}\right)+\dfrac{3}{5}:\dfrac{-21}{15}\\ =\dfrac{3}{5}:\dfrac{3}{30}+\dfrac{3}{5}:\dfrac{-7}{5}\\ =\dfrac{3}{5}\cdot10+\dfrac{3}{5}\cdot\dfrac{5}{-7}\\ =6-\dfrac{3}{7}\\ =\dfrac{39}{7}\)