mình cần gấp
a: 6/7=1-1/7
5/6=1-1/6
mà -1/7>-1/6
nên 6/7>5/6
b: 11/10>1>10/11
c: 18/36=3/6<7/6
6/7 bé hơn 5/6
11/10 lớn hơn 10/11
18/36 bé hơn 7/6
Ta có: \(\dfrac{6}{7}=\dfrac{6\times6}{7\times6}=\dfrac{36}{42};\dfrac{5}{6}=\dfrac{5\times7}{6\times7}=\dfrac{35}{42}\)
\(\Rightarrow\dfrac{36}{42}>\dfrac{35}{42}\)
\(\Rightarrow\dfrac{6}{7}>\dfrac{5}{6}\)
Ta có: \(\dfrac{11}{10}=\dfrac{11\times11}{10\times11}=\dfrac{121}{110};\dfrac{10}{11}=\dfrac{10\times10}{11\times10}=\dfrac{100}{110}\)
\(\Rightarrow\dfrac{121}{110}>\dfrac{100}{110}\)
\(\Rightarrow\dfrac{11}{10}>\dfrac{10}{11}\)
Ta có: \(\dfrac{18}{36}\) giữ nguyên ; \(\dfrac{7}{6}=\dfrac{7\times6}{6\times6}=\dfrac{42}{36}\)
\(\Rightarrow\dfrac{18}{36}< \dfrac{42}{36}\)
\(\Rightarrow\dfrac{18}{36}< \dfrac{7}{6}\)
\(a,\dfrac{6}{7}>\dfrac{5}{6}\)
\(b,\dfrac{11}{10}>\dfrac{10}{11}\)
\(c,\dfrac{18}{36}< \dfrac{7}{6}\)
