Bạn tham khảo :
$\dfrac{42}{46}$ + $\dfrac{250}{186}$ + $\dfrac{-2121}{2323}$ + $\dfrac{125}{143143}$
=$\dfrac{21}{23}$ + $\dfrac{250}{186}$ + $\dfrac{-21}{23}$ + $\dfrac{125}{143143}$
= ($\dfrac{21}{23}$ + $\dfrac{-21}{23}$) + $\dfrac{250}{186}$ + $\dfrac{125}{143143}$
= $0$ + $\dfrac{250}{186}$ + $\dfrac{125}{143143}$
= $\dfrac{125}{93}$ + $\dfrac{125}{143143}$
= $\dfrac{125 . 1539.17204301}{93. 1539.17204301}$ + $\dfrac{125}{143143}$
= $\dfrac{17891250}{143143}$