Toán Tính nhanh: 18x(`19191919/21212121+88888/99999`)=?? 06/12/2021 By Eliza Tính nhanh: 18x(`19191919/21212121+88888/99999`)=??
Đáp án: `226/7` Các bước giải: \begin{array}{l} 18×(\dfrac{19191919}{21212121}+\dfrac{88888}{99999})\\ = 18×(\dfrac{19}{21}+\dfrac{8}{9})\\ =18×\dfrac{339}{189}\\ =18×\dfrac{113}{63}\\ =\dfrac{226}{7} \end{array} Trả lời
`18×(19191919/21212121+88888/99999)`
`=18×(19/21+8/9)`
`=18×113/63`
`=226/7`
Đáp án: `226/7`
Các bước giải:
\begin{array}{l} 18×(\dfrac{19191919}{21212121}+\dfrac{88888}{99999})\\ = 18×(\dfrac{19}{21}+\dfrac{8}{9})\\ =18×\dfrac{339}{189}\\ =18×\dfrac{113}{63}\\ =\dfrac{226}{7} \end{array}