\(57,3\times101-57-0,3\)

\(=\left(57,3-0,3\right)\times101-57\)

\(=57\times101-57\times1\)

\(=57\times\left(101-1\right)\)

\(=57\times100\)

\(=5700\)

\(\dfrac{7}{5}\times\dfrac{5}{27}\times\dfrac{6}{7}:\dfrac{5}{27}\)

\(C,\dfrac{7}{5}\times\dfrac{5}{27}\times\dfrac{6}{7}\times\dfrac{27}{5}\)

\(C=\left(\dfrac{5}{27}\times\dfrac{27}{5}\right)\times\left(\dfrac{7}{5}\times\dfrac{6}{7}\right)\)

\(C=1\times\dfrac{6}{5}\)

\(C=\dfrac{6}{5}\)

ê 

Hải Đăng kia , sao lại nói lúc này

đã có r

chịu mik ko btt

\(1\) giờ 30 phút = 1,5 giờ

1 giờ 30 phút = 90 phút

Phan Đình Giót

\(\dfrac{-5}{8}+\dfrac{-12}{29}\times\dfrac{8}{-10}\times5,8\)

\(=\dfrac{-5}{8}+\dfrac{-12}{29}\times\dfrac{8}{-10}\times\dfrac{58}{10}\)

\(=\left(\dfrac{-5}{8}\times\dfrac{8}{-10}\right)+\left(\dfrac{-12}{29}\times\dfrac{58}{10}\right)\)

\(=\dfrac{1}{2}+-\dfrac{12}{5}=\dfrac{5}{10}+-\dfrac{24}{10}\)

\(=-\dfrac{21}{10}\)

\(\dfrac{-7}{25}+\dfrac{-18}{25}+\dfrac{4}{23}+\dfrac{5}{7}+\dfrac{10}{23}\)

\(=\left(\dfrac{-7}{25}+\dfrac{-18}{25}\right)+\left(\dfrac{4}{23}+\dfrac{10}{23}\right)+\dfrac{5}{7}\)

\(=-1+\dfrac{14}{23}+\dfrac{5}{7}\)

\(=-\dfrac{9}{23}+\dfrac{5}{7}\)

\(=\dfrac{52}{161}\)

\(0,25.x+\dfrac{1}{4}=3\)

\(0,25.x=3-\dfrac{1}{4}\)

\(0,25.x=2,75\)

        \(x=2,75:0,25\)

        \(x=11\)