B= 1/2 x 2/3 x 3/4 x ...........x 2002/2003 x 2003/2004

1 x 2 x 3 x 4 x .............x 2002 x 2003

2 x 3 x 4 x .............x 2003 x 2004

1

 2004

\(\left(6\div\dfrac{3}{5}-1\dfrac{1}{6}\times\dfrac{6}{7}\right)\div\left(4\dfrac{1}{5}\times\dfrac{10}{11}+5\dfrac{2}{11}\right)\)

\(=\left(6\times\dfrac{5}{3}-\dfrac{7}{6}\times\dfrac{6}{7}\right)\div\left(\dfrac{21}{5}\times\dfrac{10}{11}+\dfrac{57}{11}\right)\)

\(=\left(10-1\right)\div\left(\dfrac{210}{55}+\dfrac{57}{11}\right)\)

\(=9\div9\)

\(=1\)

sai đầu bài ak bn tự nhiên lại có chữ và ????????

nghĩa là hỗn số ý bạn

\(A=\left(6\text{ : }\frac{3}{5}-1\frac{1}{6}\text{ x }\frac{6}{7}\right)\text{ : }\left(4\frac{1}{5}\text{ x }\frac{10}{11}+5\frac{2}{11}\right)\)

\(A=\left(6\text{ : }\frac{3}{5}-\frac{7}{6}\text{ x }\frac{6}{7}\right)\text{ : }\left(\frac{21}{5}\text{ x }\frac{10}{11}+\frac{57}{11}\right)\)

\(A=\left(10-1\right)\text{ : }\left(\frac{42}{11}+\frac{57}{11}\right)\)

\(A=9\text{ : }9\)

\(A=1\)

a: \(6:\dfrac{3}{5}-1\dfrac{1}{6}\cdot\dfrac{6}{7}\)

\(=6\cdot\dfrac{5}{3}-\dfrac{7}{6}\cdot\dfrac{6}{7}\)

=10-1

=9

\(4\dfrac{1}{5}\cdot\dfrac{10}{11}+5\dfrac{2}{11}\)

\(=\dfrac{21}{5}\cdot\dfrac{10}{11}+\dfrac{57}{11}\)

\(=\dfrac{42}{11}+\dfrac{57}{11}=9\)

=>Đ

a,đ

A = \(\left(6:\frac{3}{5}-1\frac{1}{6}\times\frac{6}{7}\right):\left(4\frac{1}{5}\times\frac{10}{11}+5\frac{2}{11}\right)\)

  = \(\left(6\times\frac{5}{3}-\frac{7}{6}\times\frac{6}{7}\right):\left(\frac{21}{5}\times\frac{10}{11}+\frac{57}{11}\right)\)

  = \(9:\left(\frac{42}{11}+\frac{57}{11}\right)\)

 = 9 : \(\frac{99}{11}\)

= 9 : 9 = 1 

^^ Học tốt!!!

và tức là sao vậy???

tinh gia tri bieu thuc ho mk roi mk k cho