Đáp án + Giải thích các bước giải:
g.1$\dfrac{13}{15}$ . (0,5)^2 . 3 + ($\dfrac{8}{15}$ - 1$\dfrac{19}{60}$) : 1$\dfrac{23}{24}$
=$\dfrac{28}{15}$ . $\dfrac{1}{4}$ . 3 + ($\dfrac{8}{15}$ - $\dfrac{79}{60}$) : $\dfrac{47}{24}$
=$\dfrac{28}{15}$ . $\dfrac{1}{4}$ . 3 + ($\dfrac{-47}{60}$) : $\dfrac{47}{24}$
=$\dfrac{7}{15}$ . 3 + ($\dfrac{-47}{60}$) : $\dfrac{47}{24}$
=$\dfrac{7}{5}$ + ($\dfrac{-47}{60}$) : $\dfrac{47}{24}$
=$\dfrac{7}{5}$ + $\dfrac{-2}{5}$
=$\dfrac{5}{5}$ = 1
