điền dấu < = > vào chỗ chấm
a)\(\dfrac{2}{3}\)+\(\dfrac{1}{4}\)+\(\dfrac{5}{6}\)...\(\dfrac{7}{4}\)
b)\(\dfrac{4}{5}\)+\(\dfrac{2}{3}\)*2-\(\dfrac{1}{5}\)...\(\dfrac{1}{2}\)
c)\(\dfrac{1}{2}\)+\(\dfrac{1}{4}\)+\(\dfrac{1}{8}\)+\(\dfrac{1}{16}\)...\(\dfrac{15}{16}\)
d)\(\dfrac{1515:101}{2525:101}\)...\(\dfrac{3}{5}\)
\(\dfrac{2}{5}\) x \(\dfrac{3}{4}-\dfrac{1}{8}\) \(= \)
\(\dfrac{4}{3}+\dfrac{1}{3}-\dfrac{1}{5}=\)
\(\dfrac{9}{20}-\dfrac{3}{5}\) x \(\dfrac{1}{4}\)\(= \)
\(\dfrac{2}{8}+\dfrac{2}{3}:\dfrac{4}{5}\)\(=\)
Tính :
\(\dfrac{1}{2}\) + \(\dfrac{1}{3}\) - \(\dfrac{1}{5}\)
\(\dfrac{1}{5}\) : \(4\) + \(\dfrac{3}{4}\)
\(\dfrac{4}{3}\) x \(\dfrac{9}{5}\) - \(\dfrac{3}{10}\)
a,\(\dfrac{5}{2}x\dfrac{1}{3}+\dfrac{1}{4}\)
b,\(\dfrac{5}{2}+\dfrac{1}{3}x\dfrac{1}{4}\)
c,\(\dfrac{5}{2}-\dfrac{1}{3}:\dfrac{1}{4}\)
ghi kết quả hay trình cũng được
\(A=\dfrac{19+\dfrac{18}{2}+\dfrac{17}{3}+\dfrac{16}{4}+...+\dfrac{2}{18}+\dfrac{1}{19}}{\dfrac{1}{2}+\dfrac{1}{3}+\dfrac{1}{4}+...+\dfrac{1}{19}+\dfrac{1}{20}}\)
a, \(\dfrac{1}{2}\) x \(\dfrac{1}{3}\) x \(\dfrac{1}{4}\) = b, \(\dfrac{1}{2}\): \(\dfrac{1}{3}\):\(\dfrac{1}{4}\)= c, \(\dfrac{1}{3}\) x \(\dfrac{1}{5}\) : \(\dfrac{1}{7}\)=
a.\(\dfrac{2}{7}\) x \(\dfrac{4}{3}\) + \(\dfrac{2}{6}\)
B.\(\dfrac{4}{7}\) : 2 + \(\dfrac{4}{7}\)
C.\(\dfrac{1}{3}+\dfrac{3}{4}-\dfrac{1}{5}:\dfrac{2}{3}\)
Tìm x
a, \(\dfrac{5}{8}\) \(-\) \(x\) \(=\) \(\dfrac{4}{7}\) x\(\dfrac{1}{4}\)
b, \(x:\) \(\dfrac{4}{5}\) \(=\) \(\dfrac{3}{4}\) \(+\) \(\dfrac{1}{6}\)
\(\dfrac{4}{5}+\dfrac{1}{10}\)
\(\dfrac{7}{12}\) \(-\) \(\dfrac{1}{4}\)
5 x \(\dfrac{4}{15}\)
\(\dfrac{2}{5}:\dfrac{6}{5}\)
a,\(\dfrac{2}{3}\)x\(\dfrac{5}{2}\):\(\dfrac{9}{5}\)
b,\(\dfrac{1}{3}\)x\(\dfrac{1}{4}\)+\(\dfrac{5}{6}\)
c,\(\dfrac{1}{2}\)-\(\dfrac{7}{8}\):\(\dfrac{7}{4}\)
d,\(\dfrac{6}{5}\)-\(\dfrac{4}{5}\)x\(\dfrac{3}{2}\)