When..did you meet..(you/meet) your wife? -3 years ago.

Sửa lại:

= \(\left(\dfrac{3}{4}-\dfrac{3}{4}\right)\)+\(\left(\dfrac{1}{2}-\dfrac{4}{5}\right)\)

= \(0+\left(-\dfrac{3}{10}\right)\)

= \(\dfrac{-3}{10}\)

mik sửa lạ nha!

     \(\dfrac{1}{2}\)+\(\dfrac{3}{4}\)-\(\left(\dfrac{4}{5}+\dfrac{3}{4}\right)\)

= \(\dfrac{1}{2}\)+\(\dfrac{3}{4}\)- \(\dfrac{4}{5}-\dfrac{3}{4}\)

= \(\left(\dfrac{3}{4}-\dfrac{3}{4}\right)\)+\(\left(\dfrac{1}{2}-\dfrac{4}{5}\right)\)

= \(\dfrac{1}{4}\)+ \(\left(\dfrac{5}{10}-\dfrac{8}{10}\right)\)

= \(\dfrac{1}{4}\)+(-\(\dfrac{3}{10}\))

= \(\dfrac{10}{40}\)-\(\dfrac{12}{40}\)

= \(\dfrac{1}{20}\)

a, 1000

b,17460

8. They must be very ____unconfident____ to enter such a big competition. (confidence)

9. It is not a good idea to ____confident____ in a person like him. (confidence)

He would rather _socialise _ with other people at a club than stay at home alone. (social)

. He has few friends because he is not very _sociable_. (social) 

1.yes

2.yes

3. no

4.no

5.yes

ko có chi