\(\frac{1313}{1212}:x=\frac{1}{1.2}+\frac{1}{2.3}+\frac{1}{3.4}+\frac{1}{4.5}+\)\(\frac{1}{5.6}\)

\(\Leftrightarrow\frac{13}{12}:x=1-\frac{1}{2}+\frac{1}{2}-\frac{1}{3}+\frac{1}{3}-\frac{1}{4}+\frac{1}{4}-\frac{1}{5}+\frac{1}{5}-\frac{1}{6}\)

\(\Leftrightarrow\frac{13}{12}:x=1-\frac{1}{6}\)

\(\Leftrightarrow\frac{13}{12}:x=\frac{5}{6}\)

\(\Leftrightarrow x=\frac{13}{12}:\frac{5}{6}\)

\(\Leftrightarrow x=\frac{13}{10}\)

  Vậy \(x=\frac{13}{10}\)

                            ~~~~~Hok tốt ~~~~~

a,\(\frac{1313}{1212}\div x=\frac{1}{1\times2}+\frac{1}{2\times3}+\frac{1}{3\times4}+\frac{1}{4\times5}+\frac{1}{5\times6}\)

\(\frac{13}{12}\div x=1-\frac{1}{2}+\frac{1}{2}-\frac{1}{3}+\frac{1}{3}-\frac{1}{4}+\frac{1}{4}-\frac{1}{5}+\frac{1}{5}-\frac{1}{6}\)

\(\frac{13}{12}\div x=1-\frac{1}{6}\)

\(\frac{13}{12}\div x=\frac{5}{6}\)

\(x=\frac{13}{12}\div\frac{5}{6}\)

\(x=\frac{13}{12}\times\frac{6}{5}\)

\(x=\frac{13}{10}\)

Chúc bạn hok tốt !

\(\frac{1313}{1212}:x=\frac{1}{1x2}+\frac{1}{2x3}+...+\frac{1}{5x6}\)

\(\frac{1313}{1212}:\frac{101}{101}=\frac{13}{12}:x=\frac{1}{1}-\frac{1}{2}+\frac{1}{2}-\frac{1}{3}+...+\frac{1}{5}-\frac{1}{6}\)

\(\frac{13}{12}:x=1-\frac{1}{6}\)

\(\frac{13}{12}:x=\frac{5}{6}\)

\(x=\frac{13}{12}:\frac{5}{6}\)

\(x=\frac{78}{60}=\frac{13}{10}\)

       \(\frac{1313}{1212}:x=\frac{1}{1.2}+\frac{1}{2.3}+\frac{1}{3.4}+\frac{1}{4.5}+\)\(\frac{1}{5.6}\)

\(\Leftrightarrow\frac{13}{12}:x=1-\frac{1}{2}+\frac{1}{2}-\frac{1}{3}+\frac{1}{3}-\frac{1}{4}+\frac{1}{4}-\frac{1}{5}+\frac{1}{5}-\frac{1}{6}\)

\(\Leftrightarrow\frac{13}{12}:x=1-\frac{1}{6}\)

\(\Leftrightarrow\frac{13}{12}:x=\frac{5}{6}\)

\(\Leftrightarrow x=\frac{13}{12}:\frac{5}{6}\)

\(\Leftrightarrow x=\frac{13}{10}\)

                  Hok tốt

c)x:25/8-3/4=9/4

x:25/8=9/4+3/4

x:25/8=3

x=3 nhân 25/8

x=75/8

tất cả các bài có người làm rồi li-ke cho mình nha

3628800

Cho mik bài giải nhé nnọi người

     36 x 28 + 36 x 82 + 64 x 69 + 64 x 41 

= 36 x ( 28 + 82 ) + 64 x ( 69 + 41 ) 

= 36 x     100          + 64 x        100

= ( 36 + 64 ) x  100

=     100          x  100

=    10000

36x28+36x82+64x69+64x41

=36.(28+82)+64.(69+41)

=36.100+64.100

=100.(36+64)

=100.100

=10000

= 10000 nha

5/16 : 0,125 + 1,456 : 7/25 + 9/2 x 0,8 = 6.10832

Bạn có thể cho mik các bước ko LovE _ Khánh Ly _ LovE ?

Số cần

5/16 : 0,125 + 1,456 : 7/25 + 9/2 x 0,8 = 6,10832

    Đáp số :..........................

\(\frac{1^2}{1\cdot2}\cdot\frac{2^2}{2\cdot3}\cdot\frac{3^2}{3\cdot4}\cdot\frac{4^2}{4\cdot5}\cdot\frac{5^2}{5\cdot6}=\frac{1^2}{1\cdot6}=\frac{1}{6}\)

lan sau nho ghi de cho dung nha bn

\(\frac{1.1.2.2.3.3.4.4.5.5}{1.2.2.3.3.4.4.5.5.6}\)=\(\frac{\left(1.2.3.4.5\right).\left(1.2.3.4.5\right)}{\left(1.2.3.4.5\right)\left(2.3.4.5.6\right)}=\frac{1}{6}\)