a) ( -2/ + 1/3 ) . ( 3/2 – 3/7) b) (1/2 – 1/3 ) . ( 5 – 1/4) 31/10/2021 Bởi Vivian a) ( -2/ + 1/3 ) . ( 3/2 – 3/7) b) (1/2 – 1/3 ) . ( 5 – 1/4)
Đáp án: $\text{a) (-2 + $\dfrac{1}{3}$ ) . ($\dfrac{3}{2}$ – $\dfrac{3}{7}$)}$ $\text{= $\dfrac{-5}{3}$ . $\dfrac{15}{14}$}$ $\text{= $\dfrac{-25}{14}$ }$ $\text{b) ($\dfrac{1}{2}$ – $\dfrac{1}{3}$ ).( 5 – $\dfrac{1}{4}$) }$ $\text{= $\dfrac{1}{6}$ . $\dfrac{19}{4}$ }$ $\text{=$\dfrac{19}{24}$ }$ Bình luận
Đáp án:
Giải thích các bước giải:
Đáp án:
$\text{a) (-2 + $\dfrac{1}{3}$ ) . ($\dfrac{3}{2}$ – $\dfrac{3}{7}$)}$
$\text{= $\dfrac{-5}{3}$ . $\dfrac{15}{14}$}$
$\text{= $\dfrac{-25}{14}$ }$
$\text{b) ($\dfrac{1}{2}$ – $\dfrac{1}{3}$ ).( 5 – $\dfrac{1}{4}$) }$
$\text{= $\dfrac{1}{6}$ . $\dfrac{19}{4}$ }$
$\text{=$\dfrac{19}{24}$ }$