Ta có :\(\frac{-5}{12}=\frac{-25}{60}\) \(\frac{7}{-10}=\frac{-42}{60}\)
Vì \(\frac{-25}{60}>\frac{-42}{60}\)
Nên \(\frac{-5}{12}>\frac{7}{-10}\)
Ta có : 5/12<7/12<7/10
=> 5/12<7/10
=>-5/12>7/-10
Quy đồng :
\(-\frac{5}{12}=\frac{-5\cdot5}{12\cdot5}=-\frac{25}{60}\)
\(\frac{7}{-10}=\frac{7\cdot\left(-6\right)}{-10\cdot\left(-6\right)}=-\frac{42}{60}\)
Vì -25 > -42
\(\Rightarrow-\frac{25}{60}>-\frac{42}{60}\)hay \(-\frac{5}{12}>\frac{7}{-10}\)
Ta có \(\frac{-5}{12}=\frac{-5.5}{12.5}=\frac{-25}{60}\)
\(\frac{-7}{10}=\frac{-7.6}{10.6}=\frac{-42}{60}\)
Vì -25 > - 42 nên \(\frac{-25}{60}>\frac{-42}{60}\)
Do đó \(\frac{-5}{12}>\frac{-7}{10}\)
Quy đồng lên ta đươc:
-5/12=-5.5/12.5=-25/60=-0,41(6)
7/-10=7.6/-10.6=42/-60=-0,7
-0,41(7)>-0,7=>-5/12>7/-10
\(\frac{-5}{12}\)và\(\frac{7}{-10}\)
Ta có:\(\frac{7}{-10}=\frac{-7}{10}\)
\(\frac{-5}{12}=\frac{\left(-5\right).5}{12.5}=\frac{-25}{60}\)
\(\frac{7}{-10}=\)\(\frac{-7}{10}=\frac{\left(-7\right).6}{10.6}=\frac{-42}{60}\)
Mà \(\left(-25\right)>\left(-42\right)\)\(=>\frac{-25}{60}>\frac{-42}{60}\)
Vậy \(\frac{-5}{12}>\frac{7}{-10}\)