Question

giúp mk với ạ 

Answer 1

tính cách gì đó??

Answer 2

\(1\dfrac{13}{15}\cdot0,25\cdot3+\left(\dfrac{8}{15}-1\dfrac{19}{60}\right):1\dfrac{23}{24}\)

\(=\dfrac{28}{15}\cdot\dfrac{1}{4}\cdot3+\left(\dfrac{8}{15}-\dfrac{79}{60}\right):\dfrac{47}{24}\)

\(=\dfrac{7}{15}\cdot3+\left(-\dfrac{47}{60}\right)\cdot\dfrac{24}{47}\)

\(=\dfrac{7}{5}+\left(-\dfrac{2}{5}\right)\)

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

\(=-1\)

Answer 3

\(1\dfrac{13}{15}.0,25.3+\left(\dfrac{8}{15}-1\dfrac{19}{60}\right):1\dfrac{23}{24}\)

= \(\dfrac{28}{15}.0,25+\left(\dfrac{8}{15}-\dfrac{79}{60}\right):\dfrac{47}{24}\)

= \(\dfrac{28}{15}.0,25+\left(\dfrac{32}{60}-\dfrac{79}{60}\right):\dfrac{47}{24}\)

= \(\dfrac{28}{15}.0,25+\left(\dfrac{-47}{60}\right):\dfrac{47}{24}\)

= \(\dfrac{28}{15}.\dfrac{25}{10}+\left(\dfrac{-47}{60}\right):\dfrac{47}{24}\)

= \(\dfrac{14}{3}.\dfrac{5}{5}+\left(\dfrac{-47}{60}\right).\dfrac{24}{47}\)

= \(\dfrac{70}{15}+\left(\dfrac{-1}{60}\right).\dfrac{24}{1}\)

= \(\dfrac{70}{15}+\left(\dfrac{-24}{60}\right)\)

= \(\dfrac{280}{60}+\left(\dfrac{-24}{60}\right)\)

= \(\dfrac{-256}{60}\) = \(\dfrac{-64}{15}\)