bài 1: Tính 

a)  \(\dfrac{-5}{7}\) . \(\dfrac{2}{11}\)  + \(\dfrac{-5}{7}\)  . \(\dfrac{9}{11}\) + 1\(\dfrac{5}{7}\)

b) \(\dfrac{-3}{14}\)  +\(\dfrac{5}{8}\)  -\(\dfrac{1}{2}\)

c) ( \(\dfrac{1}{4}\) +\(\dfrac{-5}{13}\))+( \(\dfrac{2}{11}\) + \(\dfrac{-8}{13}\) + \(\dfrac{3}{4}\)  )

d) (  \(\dfrac{21}{31}\)  + \(\dfrac{-16}{7}\)  )+( \(\dfrac{44}{53}\)  +\(\dfrac{10}{31}\) )+\(\dfrac{9}{53}\)

e) \(\dfrac{1}{9}\) - \(\dfrac{5}{6}\) -4

___________

    \(\dfrac{7}{12}\)  - \(\dfrac{1}{36}\) -10

giúp em

1. Read the passage

Hobbies are the things that we do when we have free time. However, some hobbies are good for us while others are bad. Parents and teachers are very happy when they see their children reading a schoolbook or a library book. But, if their children read magazines, especially about fashion or pop starts, then they say it is a waste of time. There are many electronic hobbies that are also good and bad for us. Chatting online, sending emails and uploading pictures are good ways for us to share information but many people waste a lot of time online and do not concentrate on their work. Too many people turn the volume up so loud that they do not hear what is happening around them. They can have serious accidents when they are on busy streets. There are also some hobbies like photography and computer game design that are very expensive. There are other hobbies like painting, drawing and playing music that are really enjoyable. There hobbies can lead to a good job if we become really good at them.

Questions:

1. Are all hobbies good for us?

2. What hobbies can help you to have a good job if you are good at them?

giúp em

1. complete the sentences

some (2)                any (2)             a             an              much              many

little                            few

1. We have________________cards to play at break time.

2. We don't need__________________tomatoes for eel soup.

3. There isn't_____________electricity in my hometown.

4. My teacher has got_____________________new car.

5. How_______________sugar do you need?    - A__________________

6. There are_____________________kinds of books in our school library.

7. There are_______________apples in the fridge, not many.

8. Would you like_______________beer?

9. What would you like for breakfast? 

___________________________apple and a glass of milk, please

1. Tìm lỗi sai

1. Reading books are very relaxing.

1)  \(\dfrac{5}{13}\)  +\(\dfrac{-5}{17}\) +   \(\dfrac{-20}{41}\)   +   \(\dfrac{8}{13}\) +\(\dfrac{-21}{41}\)

2)  \(\dfrac{1}{5}\)  +  \(\dfrac{-2}{9}\)  +   \(\dfrac{-7}{9}\) +   \(\dfrac{4}{5}\)  +\(\dfrac{16}{17}\)

3) \(\dfrac{2}{3.5}\)  + \(\dfrac{2}{5.7}\) +\(\dfrac{2}{7.9}\)  +....................+ \(\dfrac{2}{99.101}\)