-1/8 . 2/11 + 1/8 . -9/11 – 1/4 Giúp mk với ạ. Mk cảm ơn trước 25/10/2021 Bởi Sadie -1/8 . 2/11 + 1/8 . -9/11 – 1/4 Giúp mk với ạ. Mk cảm ơn trước
$\dfrac{-1}{8}. \dfrac{2}{11} + \dfrac{-1}{8} . \dfrac{-9}{11} – \dfrac{1}{4}$ $ = \dfrac{-1}{8}. \dfrac{2}{11} – \dfrac{-1}{8} . \dfrac{9}{11} – \dfrac{1}{4}$ $ = \dfrac{-1}{8} . (\dfrac{2}{11} + \dfrac{9}{11}) – \dfrac{1}{4}$ $ = \dfrac{-1}{8} . 1 – \dfrac{1}{4}$ $ = \dfrac{-1}{8} – \dfrac{2}{8}$ $ = \dfrac{-3}{8}$ Bình luận
Đáp án: $\dfrac{-1}{8}$ . $\dfrac{2}{11}$ + $\dfrac{1}{8}$ . $\dfrac{-9}{11}$ – $\dfrac{1}{4}$ = $\dfrac{-1}{44}$ + $\dfrac{-9}{88}$ – $\dfrac{1}{4}$ =$\dfrac{-3}{88}$ Bình luận
$\dfrac{-1}{8}. \dfrac{2}{11} + \dfrac{-1}{8} . \dfrac{-9}{11} – \dfrac{1}{4}$
$ = \dfrac{-1}{8}. \dfrac{2}{11} – \dfrac{-1}{8} . \dfrac{9}{11} – \dfrac{1}{4}$
$ = \dfrac{-1}{8} . (\dfrac{2}{11} + \dfrac{9}{11}) – \dfrac{1}{4}$
$ = \dfrac{-1}{8} . 1 – \dfrac{1}{4}$
$ = \dfrac{-1}{8} – \dfrac{2}{8}$
$ = \dfrac{-3}{8}$
Đáp án:
$\dfrac{-1}{8}$ . $\dfrac{2}{11}$ + $\dfrac{1}{8}$ . $\dfrac{-9}{11}$ – $\dfrac{1}{4}$
= $\dfrac{-1}{44}$ + $\dfrac{-9}{88}$ – $\dfrac{1}{4}$
=$\dfrac{-3}{88}$