Bài 1:Thực hiện phép tính (tính hợp lý nếu có thể)

1) \(\dfrac{8}{31}\)  +\(\dfrac{-12}{25}\)  +\(\dfrac{23}{31}\) +\(\dfrac{-13}{25}\)

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

3) \(\dfrac{7}{3}\)  . \(\dfrac{-5}{2}\)  . \(\dfrac{15}{21}\)  .\(\dfrac{4}{-5}\) 

4)\(\dfrac{1}{4}\) + \(\dfrac{3}{4}\)  : ( \(-\dfrac{6}{7}\)  )

5) (\(\dfrac{3}{29}\) - \(\dfrac{1}{5}\)  ) . \(\dfrac{29}{3}\)

6) \(\dfrac{5}{7}\) . \(\dfrac{5}{11}\)  + \(\dfrac{5}{7}\)  . \(\dfrac{2}{11}\)  - \(\dfrac{5}{7}\)  .\(\dfrac{14}{11}\)

7)\(\dfrac{-11}{12}\) . \(\dfrac{1}{8}\)  + \(\dfrac{11}{12}\)  .\(\dfrac{-3}{16}\)  -\(\dfrac{11}{12}\)

8) \(\dfrac{7}{4}\)  . \(\dfrac{29}{5}\) -\(\dfrac{7}{9}\) .\(\dfrac{9}{4}\) +\(3\dfrac{2}{13}\)

giúp em

1. Make up questions for the underlined word

1. The children are trusting because they don't tell lies.

(phần in đậm là phần gạch chân)

giúp em

1. Choose the best answer to complete sentences

1. They prefer reading__________watching TV. 

A. than          B. more than           C. to             D.from

giúp em

1. Put the verbs into correct tense forms

1. It (take)________________me 20 minutes to go to school.

2. Where is Nam?      -He (read)_____________books in his room.

giúp em

1. Combine each pair of sentences to make a sentence, using AND, BUT, BECAUSE, SO, ALTHOUGH

1. My sister can speak English. My sister can speak French, too.

2. Mai can ride a bike. She can't drive a car.

3. I don't like this book. It's so boring.

4. Duy was ill, He went to school.

5. She likes playing badminton. She goes to the gym every day.

giúp em

1. Choose the best answer

1. My brother___________to England three times.

A. has gone         B. have gone             C. went            D. goes

2. It is unsafe to____________there. It's very deep.

A. run              B. swim           C. go            D. do

giúp em