Giải giùm em với ạ 13/42+-5/18-11/21–4/14 .Em cảm ơn 21/10/2021 Bởi Raelynn Giải giùm em với ạ 13/42+-5/18-11/21–4/14 .Em cảm ơn
$\dfrac{13}{42}$ `+` `( -` $\dfrac{5}{18}$ `)` `-` $\dfrac{11}{21}$ `-` `( – `$\dfrac{4}{14}$ `)` `=` `(` $\dfrac{13}{42}$ `-` $\dfrac{11}{21}$ `+` $\dfrac{4}{14}$ `)` `-` $\dfrac{5}{18}$ `=` $\dfrac{13 – ( 11 . 2 )+ ( 4 . 3 )}{42}$ `-` $\dfrac{5}{18}$ `=` $\dfrac{1}{14}$ `-` $\dfrac{5}{18}$ `=` $\dfrac{9 – 35}{126}$ `=` $\dfrac{-26}{126}$ `=` $\dfrac{13}{63}$ Bình luận
$\dfrac{13}{42}$ `+` `( -` $\dfrac{5}{18}$ `)` `-` $\dfrac{11}{21}$ `-` `( – `$\dfrac{4}{14}$ `)`
`=` `(` $\dfrac{13}{42}$ `-` $\dfrac{11}{21}$ `+` $\dfrac{4}{14}$ `)` `-` $\dfrac{5}{18}$
`=` $\dfrac{13 – ( 11 . 2 )+ ( 4 . 3 )}{42}$ `-` $\dfrac{5}{18}$
`=` $\dfrac{1}{14}$ `-` $\dfrac{5}{18}$
`=` $\dfrac{9 – 35}{126}$ `=` $\dfrac{-26}{126}$ `=` $\dfrac{13}{63}$