\(4532+565656=570188\)

=570188

570188

\(\frac{575757}{424242}+\frac{575757}{565656}+\frac{575757}{727272}=\frac{57\times10101}{42\times10101}+\frac{57\times10101}{56\times10101}+\frac{57\times10101}{72\times10101}\)

\(=\frac{57}{42}+\frac{57}{56}+\frac{57}{72}=57\times\left(\frac{1}{42}+\frac{1}{56}+\frac{1}{72}\right)\)

\(=57\times\left(\frac{1}{6\times7}+\frac{1}{7\times8}+\frac{1}{8\times9}\right)\)

\(=57\times\left(\frac{7-6}{6\times7}+\frac{8-7}{7\times8}+\frac{9-8}{8\times9}\right)\)

\(=57\times\left(\frac{1}{6}-\frac{1}{7}+\frac{1}{7}-\frac{1}{8}+\frac{1}{8}-\frac{1}{9}\right)\)

\(=57\times\left(\frac{1}{6}-\frac{1}{9}\right)=\frac{19}{6}\)

=\(70\left(\frac{121212}{565656}+\frac{121212}{727272}+\frac{121212}{909090}\right)\)

=\(70\left(\frac{3.40404}{14.40404}+\frac{121212}{6.121212}+\frac{2.60606}{15.60606}\right)\)

=\(70\left(\frac{3}{14}+\frac{1}{6}+\frac{2}{15}\right)\)

=\(70.\frac{18}{35}=38\)

70.(13/56+13/72+13/90)

=70.39/70=39

đúg nha

B=39 tick cho mình nha nha nha nha

http://coccoc.com/search#query=140.+(+505050%2F565656+%2B+505050%2F727272+%2B+505050%2F909090+)

\(140.\left(\frac{505050}{565656}+\frac{505050}{727272}+\frac{505050}{909090}\right)\)

\(=140.\left(\frac{50}{56}+\frac{50}{72}+\frac{50}{90}\right)\)

\(=140.\left(\frac{25}{28}+\frac{25}{36}+\frac{5}{9}\right)\)

\(=140.\frac{225+175+140}{252}\)

\(=140.\frac{540}{252}=140.\frac{15}{7}=300\)

8.07605229591837

rut gon

= (57/42+57/56+57/72)*18

=19/6*18

=57