Đáp án:
b. \( - \dfrac{{92}}{{277}} > - \dfrac{{176}}{{527}}\)
Giải thích các bước giải:
\(\begin{array}{l}
a. - \dfrac{{47}}{{83}} = \dfrac{{ - 47.73}}{{83.73}} = \dfrac{{ - 3431}}{{6059}}\\
- \dfrac{{65}}{{73}} = \dfrac{{ - 65.83}}{{73.83}} = \dfrac{{ - 5395}}{{6059}}\\
Do:\dfrac{{ - 3431}}{{6059}} > \dfrac{{ - 5395}}{{6059}}\\
\to - \dfrac{{47}}{{83}} > - \dfrac{{65}}{{73}}\\
b. - \dfrac{{176}}{{527}} = \dfrac{{ - 176.277}}{{527.277}} = \dfrac{{ - 48752}}{{145979}}\\
- \dfrac{{92}}{{277}} = \dfrac{{ - 92.527}}{{277.527}} = \dfrac{{ - 48484}}{{145979}}\\
Do:\dfrac{{ - 48484}}{{145979}} > \dfrac{{ - 48752}}{{145979}}\\
\to - \dfrac{{92}}{{277}} > - \dfrac{{176}}{{527}}
\end{array}\)
