-15/8 * ( 8/-15 + 32/27) - 15/7 kíu em kíu em các bác ưiii:>>

Đáp án: $\text{$\dfrac{- 58}{63}$}$

Giải thích các bước giải:

$\text{$\dfrac{- 15}{8}$ . ($\dfrac{8}{- 15}$ + $\dfrac{32}{27}$) - $\dfrac{15}{7}$}$

$\text{= $\dfrac{- 15}{8}$ . ($\dfrac{- 72}{135}$ + $\dfrac{160}{135}$) - $\dfrac{15}{7}$}$

$\text{= $\dfrac{- 15}{8}$ . $\dfrac{88}{135}$ - $\dfrac{15}{7}$}$

$\text{= $\dfrac{11}{9}$ - $\dfrac{15}{7}$}$

$\text{= $\dfrac{77}{63}$ - $\dfrac{135}{63}$}$

$\text{= $\dfrac{- 58}{63}$}$