Tính nhanh

\(\left(\dfrac{5}{7}-\dfrac{7}{5}\right)-\left[\dfrac{1}{2}-\left(-\dfrac{2}{7}-\dfrac{1}{10}\right)\right]\)

Bài 4 : Tính nhanh

\(\dfrac{-1}{24}-\left[\dfrac{1}{4}-\left(\dfrac{1}{2}-\dfrac{7}{8}\right)\right]\)

Bài 4 : Tính nhanh
a) \(\dfrac{-1}{24}-\left[\dfrac{1}{4}-\left(\dfrac{1}{2}-\dfrac{7}{8}\right)\right]\)
b) \(\left(\dfrac{5}{7}-\dfrac{7}{5}\right)-\left[\dfrac{1}{2}-\left(-\dfrac{2}{7}-\dfrac{1}{10}\right)\right]\)

c) \(\left(-\dfrac{1}{2}\right)-\left(-\dfrac{3}{5}\right)+\left(-\dfrac{1}{9}\right)+\dfrac{1}{71}-\left(-\dfrac{2}{7}\right)+\dfrac{4}{35}-\dfrac{7}{18}\)

:))?

23

VI . Rewrite the following sentences without changing their original meanings.
5 . Drinking so much wine is not good for your father.

-> Your father __________________________________________

6 . Getting up early every day is good for your health

-> You ________________________________________
9 . It's good for you to take exercise every day.
-> You ________________________________________
10 . It's very important not to drink the water there. It will make you ill
-> You ________________________________________