9\11+[-2\5+1\6]:11\30 giúp e vs cần lắm ah 04/10/2021 Bởi Adeline 9\11+[-2\5+1\6]:11\30 giúp e vs cần lắm ah
`\frac{9}{11} + [\frac{-2}{5} + \frac{1}{6}] : \frac{11}{30}` ` = \frac{9}{11} + [\frac{-12}{30} + \frac{5}{30}] : \frac{11}{30}` ` = \frac{9}{11} + \frac{-7}{30} . \frac{30}{11} ` ` = \frac{9}{11} + \frac{-7}{11} ` ` = \frac{2}{11}` Bình luận
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`\frac{9}{11} + [\frac{-2}{5} + \frac{1}{6}] : \frac{11}{30}`
` = \frac{9}{11} + [\frac{-12}{30} + \frac{5}{30}] : \frac{11}{30}`
` = \frac{9}{11} + \frac{-7}{30} . \frac{30}{11} `
` = \frac{9}{11} + \frac{-7}{11} `
` = \frac{2}{11}`