bằng \(\frac{23}{12}\)

đồng ý

Khó

=\(\frac{2001x2004x1001x2006}{2004x2006x2001x2002}\)=\(\frac{1}{2}\)

\(=\frac{2001.2004.1001.2002}{2004.2006.2001.2002}=\frac{1.1.1001.1}{1.2006.1.1}=\frac{1001}{2006}\)

1/5*2/7:1/7=1/5*2/7*7.

               =(1*2*7)/(5*7*1).

               =2/5.

tk mk nha các bn.

-chúc ai tk mk học giỏi nha-

\(\frac{1}{5}.\frac{2}{7}.7=\frac{2}{5}\)

\(a.\left(\frac{6}{11}+\frac{5}{11}\right).\frac{3}{7}=1\cdot\frac{3}{7}=\frac{3}{7}b.\frac{3}{5}\cdot\frac{7}{9}+\frac{3}{5}\cdot\frac{2}{9}=\frac{3}{5}\cdot\left(\frac{7}{9}+\frac{2}{9}\right)=\frac{3}{5}\cdot1=\frac{3}{5}\)

\(\frac{9}{7}\times x+\frac{5}{7}\times x=\frac{2}{8}\)

\(x\times\left(\frac{9}{7}+\frac{5}{7}\right)=\frac{2}{8}\)

\(x\times2=\frac{2}{8}\)

\(x=\frac{2}{8}:2\)

\(x=\frac{1}{8}\)

79​×x+75​×x=82​

\(x \times \left(\right. \frac{9}{7} + \frac{5}{7} \left.\right) = \frac{2}{8}\)

\(x \times 2 = \frac{2}{8}\)

\(x = \frac{2}{8} : 2\)

\(x = \frac{1}{8}\)

a nha bn

\(\frac{5}{8}=\frac{5\cdot3}{8\cdot3}=\frac{15}{24}\)

A.15/24

\(\frac{5}{6}+\frac{8}{4}=\frac{10}{12}+\frac{24}{12}=\frac{34}{12}=\frac{17}{6}\)

\(\frac{5}{6}+\frac{8}{4}=\frac{5}{6}+2=\frac{17}{6}\)

mink hết lượt kb rồi  nhưng bạn ủng hộ mink nha, làm ơn bn

\(\frac{8}{11}+\frac{8}{33}\times\frac{3}{4}\)

\(=\frac{8}{11}+\frac{2}{11}\)

\(=\frac{8+2}{11}\)

\(=\frac{10}{11}\)

\(\frac{8}{11}+\frac{8}{33}\cdot\frac{3}{4}=\frac{8}{11}+\frac{8\cdot3}{33\cdot4}=\frac{8}{11}+\frac{2}{11}=\frac{10}{11}\)

kết quả = \(\frac{269}{210}\)nha bạn

ai tốt bụng thì tk cho mk , mk đg âm điểm đây huhu

=793/630 

phải ko

\(\frac{8}{15}:\frac{2}{11}+\frac{7}{15}:\frac{2}{11}\)

\(=\left(\frac{8}{15}+\frac{7}{15}\right):\frac{2}{11}\)

\(=1:\frac{2}{11}\)

\(=\frac{11}{2}\)

   8/15 : 2/11 + 7/15 : 2/11

= (8/15 + 7/15) : 2/11

=       15/15      : 2/11

=          15/15  x  11/2

=                  165/30