`d) 38/45 – ( 8/45 – 17/51 – 3/11 )` `e) (11/4 . -5/9 – 4/9 . 11/4) . 8/33` 05/08/2021 Bởi Anna `d) 38/45 – ( 8/45 – 17/51 – 3/11 )` `e) (11/4 . -5/9 – 4/9 . 11/4) . 8/33`
$d$) `38/45 – (8/45 – 17/51 – 3/11)` `= 38/45 – 8/45 + 17/51 + 3/11` `= 30/45 + 17/51 + 3/11` `= 34/51 + 17/51 + 3/11` `= 1 + 3/11` `= 14/11` $e$) `(11/4 . {-5}/9 – 4/9 . 11/4) . 8/33` `= [ 11/4 . (-5/9 – 4/9)] . 8/33` `= [11/4 . (-1)] . 8/33` `= -11/4 . 8/33` `= -2/3` Bình luận
d, $\dfrac{38}{45}-(\dfrac{8}{45}-\dfrac{17}{51}-\dfrac{3}{11})$ $=\dfrac{38}{45}-\dfrac{8}{45}+\dfrac{17}{51}+\dfrac{3}{11}$ $=\dfrac{2}{3}+\dfrac{17}{51}+\dfrac{3}{11}$ $=\dfrac{34}{51}+\dfrac{17}{51}+\dfrac{3}{11}$ $=1+\dfrac{3}{11}$ $=\dfrac{14}{11}$ e, $\Bigg(\dfrac{11}{4}.\dfrac{-5}{9}-\dfrac{11}{4}.\dfrac{4}{9}\Bigg).\dfrac{8}{33}$ $=\dfrac{-11}{4}.(\dfrac{5}{9}+\dfrac{4}{9}).\dfrac{8}{33}$ $=\dfrac{-11}{4}.\dfrac{8}{33}$ $=\dfrac{-2}{3}$ Bình luận
$d$) `38/45 – (8/45 – 17/51 – 3/11)`
`= 38/45 – 8/45 + 17/51 + 3/11`
`= 30/45 + 17/51 + 3/11`
`= 34/51 + 17/51 + 3/11`
`= 1 + 3/11`
`= 14/11`
$e$) `(11/4 . {-5}/9 – 4/9 . 11/4) . 8/33`
`= [ 11/4 . (-5/9 – 4/9)] . 8/33`
`= [11/4 . (-1)] . 8/33`
`= -11/4 . 8/33`
`= -2/3`
d,
$\dfrac{38}{45}-(\dfrac{8}{45}-\dfrac{17}{51}-\dfrac{3}{11})$
$=\dfrac{38}{45}-\dfrac{8}{45}+\dfrac{17}{51}+\dfrac{3}{11}$
$=\dfrac{2}{3}+\dfrac{17}{51}+\dfrac{3}{11}$
$=\dfrac{34}{51}+\dfrac{17}{51}+\dfrac{3}{11}$
$=1+\dfrac{3}{11}$
$=\dfrac{14}{11}$
e,
$\Bigg(\dfrac{11}{4}.\dfrac{-5}{9}-\dfrac{11}{4}.\dfrac{4}{9}\Bigg).\dfrac{8}{33}$
$=\dfrac{-11}{4}.(\dfrac{5}{9}+\dfrac{4}{9}).\dfrac{8}{33}$
$=\dfrac{-11}{4}.\dfrac{8}{33}$
$=\dfrac{-2}{3}$