mik ko ghi lại đề nhé!

\(A=\left(\frac{18}{15}.\frac{1}{4}.3\right)+\left(-\frac{47}{60}\right).\frac{24}{47}\)

\(A=\frac{8}{5}+\left(-\frac{2}{5}\right)\)

\(A=\frac{6}{5}\)

\(B=\frac{3}{4}.\frac{28}{15}-\left(\frac{8}{15}+\frac{1}{4}\right).\frac{24}{47}-\frac{17}{13}\)

\(B=\frac{7}{5}-\frac{47}{60}.\frac{24}{47}-\frac{17}{13}\)

\(B=\frac{7}{5}-\frac{2}{5}-\frac{17}{13}\)

\(B=1-\frac{17}{13}\)

\(B=-\frac{4}{13}\)

THANKS

a) =\(\frac{57}{100}+\frac{17}{15}.\frac{25}{68}-\frac{1141}{500}\)

= \(\frac{57}{100}+\frac{1}{3}.\frac{5}{4}-\frac{1141}{500}\)

= \(\frac{57}{100}+\frac{5}{12}-\frac{1141}{500}\)

= -\(\frac{1943}{1500}\)

"." là nhân

b) = \(\frac{28}{15}.\frac{3}{4}-\left(\frac{8}{15}+\frac{1}{4}\right).\frac{21}{47}\)

= \(\frac{7}{5}-\frac{47}{60}.\frac{21}{47}\)

= \(\frac{7}{5}-\frac{7}{20}\)

= \(\frac{28}{20}-\frac{7}{20}\)

= \(\frac{21}{20}\)

K nhé

\(1\frac{13}{15}\cdot\left(0.5\right)^2\cdot\left|-3\right|+\left(\frac{8}{15}-25\%\right):1\frac{23}{24}\)

\(=\frac{28}{15}\cdot\frac{1}{4}\cdot3+\left(\frac{8}{15}-\frac{1}{4}\right)\cdot\frac{47}{24}\)

\(=\frac{28\cdot1\cdot3}{15\cdot4}+\frac{17}{60}\cdot\frac{47}{24}\)

\(=\frac{21}{25}+\frac{799}{1440}=\frac{10043}{7200}\)

 =28/15 . 3/4-(8/15+1/4)

=7/5-(32/60-15/60)

=7/5-47/60

=84/60-47/60

=37/60

= \(\frac{17}{8}:\frac{25}{14}-\left(15-\frac{40}{3}\right):\frac{25}{6}\)

= \(\frac{17}{8}.\frac{14}{25}-\left(\frac{45}{3}-\frac{40}{3}\right).\frac{6}{25}\)

= \(\frac{119}{100}-\frac{5}{3}.\frac{6}{25}\)  =  \(\frac{119}{100}-\frac{2}{5}\)

=  \(\frac{119}{100}-\frac{40}{100}=\frac{79}{100}\)

Chúc bạn Hk tốt!!!!!

=\(\frac{79}{100}\)

\(1\frac{13}{15}:\left(0,5\right)^2.3+\left(\frac{8}{15}-1\frac{19}{60}\right):1\frac{23}{24}=\frac{28}{15}.12+\left(\frac{8}{15}-\frac{79}{60}\right).\frac{24}{47}\)

                                                                         \(=\frac{112}{5}+\left(-\frac{47}{60}.\frac{24}{47}\right)\)

                                                                         \(=\frac{112}{5}-\frac{2}{5}\)

                                                                        \(=\frac{100}{5}=20\)

Study well ! >_<

\(1\frac{13}{15}:0,5^2.3+\left(\frac{8}{15}-1\frac{19}{60}\right):1\frac{23}{24}\)

\(=\frac{28}{15}:0,25.3+\left(\frac{8}{15}-\frac{79}{60}\right):\frac{47}{24}\)

\(=\frac{112}{15}.3+\left(\frac{32}{60}-\frac{79}{60}\right):\frac{47}{24}\)

\(=\frac{112}{5}+\frac{-47}{60}:\frac{47}{24}\)

\(=\frac{112}{5}+\frac{-47}{60}.\frac{24}{47}\)

\(=\frac{112}{5}+\frac{-1}{5}.\frac{2}{1}\)

\(=\frac{112}{5}+\frac{-2}{5}\)

\(=\frac{110}{5}\)

\(=\frac{22}{1}=22\)