\(\dfrac{11}{3}-\dfrac{2}{3}\left(2\dfrac{2}{5}x\dfrac{1}{4}+0,2\right)\)

\(\Leftrightarrow3\left(\dfrac{12}{5}\times\dfrac{1}{4}+0,2\right)\)

\(\Leftrightarrow3\left(\dfrac{3}{5}+\dfrac{1}{5}\right)\)

\(\Leftrightarrow3\times\dfrac{4}{5}\)

\(\Leftrightarrow\dfrac{12}{5}\)

  \(\dfrac{11}{3}-\dfrac{2}{3}\times\left(2\dfrac{2}{5}+\dfrac{1}{4}+0,2\right)\) 

\(=\dfrac{9}{3}\times\left(\dfrac{12}{5}+\dfrac{1}{4}+\dfrac{1}{5}\right)\) 

\(=3\times\left(\dfrac{13}{5}+\dfrac{1}{4}\right)\)

\(=3\times\dfrac{57}{20}\)

\(=\dfrac{171}{20}\)

2/5 x 1/4 : 3/8

=1/10 : 3/8

=4/15

2/5*1/4:3/8

=3/20:3/8

=3/20*8/3

=8/20

=2/5

Ai tích mk mk tích lại

`1/5xx1/2:3/10`

`=1/10xx10/3`

`=1/3`

`1/2xx1/3:1/4`

`=1/6xx4/1`

`=2/3`

a. \(\dfrac{1}{5}\times\dfrac{1}{2}:\dfrac{3}{10}=\dfrac{1}{10}:\dfrac{3}{10}=\dfrac{1}{10}\times\dfrac{10}{3}=\dfrac{10}{30}=\dfrac{1}{3}\)

b. \(\dfrac{1}{2}\times\dfrac{1}{3}:\dfrac{1}{4}=\dfrac{1}{6}:\dfrac{1}{4}=\dfrac{1}{6}\times\dfrac{4}{1}=\dfrac{4}{6}=\dfrac{2}{3}\)

a) \(\dfrac{1}{5}\times\dfrac{1}{2}:\dfrac{3}{10}=\dfrac{1}{5}\times\dfrac{1}{2}\times\dfrac{10}{3}=\dfrac{1\times1\times10}{5\times2\times3}=\dfrac{10}{30}=\dfrac{1}{3}\)

b) \(\dfrac{1}{2}\times\dfrac{1}{3}:\dfrac{1}{4}=\dfrac{1}{2}\times\dfrac{1}{3}\times4=\dfrac{1\times1\times4}{2\times3}=\dfrac{4}{6}=\dfrac{2}{3}\)

`5/39xx(7 4/5xx1 2/3+8 1/3xx7 4/5)`

`=5/39xx(39/5xx5/3+25/3xx39/5)`

`=5/39xx39/5(5/3+25/3)`

`=1xx30/3`

`=10`

10

10

\(\dfrac{4}{5}-\dfrac{2}{5}\times\dfrac{1}{4}=\dfrac{4}{5}-\dfrac{1}{10}=\dfrac{8}{10}-\dfrac{1}{10}=\dfrac{7}{10}\)

\(\dfrac{1}{4}+\dfrac{3}{4}:\dfrac{1}{8}=\dfrac{1}{4}+\dfrac{3}{4}\times8=\dfrac{1}{4}+6=\dfrac{1}{4}+\dfrac{24}{4}=\dfrac{25}{4}\)

\(\)\(\dfrac{11}{10}-\dfrac{2}{5}:\dfrac{1}{3}=\dfrac{11}{10}-\dfrac{2}{5}\times3=\dfrac{11}{10}-\dfrac{6}{5}=\dfrac{11}{10}-\dfrac{12}{10}=-\dfrac{1}{10}\)

4/5-2/5.1/4

=4/5-1/10

=8/10-1/10

=7/10

1/4+3/4:1/8

=1/4+3/4.8

=1/4+6

=1/4+24/4

=25/4

11/10-2/5:1/3

=11/10-2/5.3

=11/10-6/5

=11/10-12/10

=-1/10

\(\dfrac{4}{5}-\dfrac{2}{5}x\dfrac{1}{4}=\dfrac{4}{5}-\dfrac{2}{20}=\dfrac{16}{20}-\dfrac{2}{20}=\dfrac{14}{20}=\dfrac{7}{10}\)

\(\dfrac{1}{4}+\dfrac{3}{4}:\dfrac{1}{8}=\dfrac{1}{4}+\dfrac{3}{4}x\dfrac{8}{1}=\dfrac{25}{4}\)

\(\dfrac{11}{10}-\dfrac{2}{5}:\dfrac{1}{3}=\dfrac{11}{10}-\dfrac{2}{5}x\dfrac{3}{1}=\dfrac{11}{10}-\dfrac{6}{5}=\dfrac{11}{10}-\dfrac{12}{10}=-\dfrac{1}{10}\)

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ủa bạn tìm j zo

mk thấy co kết  qủa rồi mà

\(M=\frac{1}{2}:\left(\frac{1}{3}:\frac{1}{4}:\frac{1}{5}\times\frac{1}{120}\right)=2008\)

\(M=\frac{1}{2}:\left(\frac{1}{3}\times\frac{4}{1}\times\frac{5}{1}\times\frac{1}{120}\right)=2008\)

\(M=\frac{1}{2}:\left(\frac{4}{3}\times\frac{1}{1}\times\frac{1}{24}\right)=2008\)

\(M=\frac{1}{2}:\left(\frac{4}{3}\times\frac{1}{24}\right)=2008\)

\(M=\frac{1}{2}:\left(\frac{1}{3}\times\frac{1}{6}\right)=2008\)

\(M=\frac{1}{2}:\frac{1}{18}=2008\)

\(M=\frac{1}{2}\times\frac{18}{1}=2008\)

\(M=\frac{18}{2}=2008\)

\(M=9=2008\)