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17 tháng 10 2021

Có : \(x+1⋮x+1\)

\(\Rightarrow2\left(x+1\right)⋮x+1\)

\(2x+2⋮x+1\)

Lại có :

 \(2x+3⋮x+1\)

\(\Rightarrow\left(2x+2\right)-\left(2x+3\right)⋮x+1\)

\(2x+2-2x-3⋮x+1\)

\(-1⋮x+1\)

\(\Rightarrow x+1\in\text{Ư}\left(-1\right)=\left\{1;-1\right\}\)

\(\Rightarrow x\in\left\{0;-2\right\}\)

17 tháng 10 2021

\(\frac{170}{3}\)

17 tháng 10 2021

x . (7 - 4) = 0

x . 3 = 0

x      = 0 . 3

x      = 0

x=7 nha bạn ~HT~
Exercise 2: Choose the word whose underline part is pronounced differently from the other.           1. A. biology B. geography C. chemistryD. play2. A. physicsB. mathsC. sciencesD. events3. A. noticeboardB. biologyC. technologyD. information4. A. roleB. noticeboardC. showD. novel5. A. novelsB. subjectsC. playsD. capitalsII. VOCABULARY Exercise 1: Write the suitable word for each picture. 1   ……………………..2   ……………………..3   …………………….. 4  ...
Đọc tiếp

Exercise 2: Choose the word whose underline part is pronounced differently from the other.          

1. A. biology

B. geography

C. chemistry

D. play

2. A. physics

B. maths

C. sciences

D. events

3. A. noticeboard

B. biology

C. technology

D. information

4. A. role

B. noticeboard

C. show

D. novel

5. A. novels

B. subjects

C. plays

D. capitals

II. VOCABULARY

 

Exercise 1: Write the suitable word for each picture.

1   ……………………..

2   ……………………..

3   ……………………..

4   ……………………..

5   ……………………..

6   ……………………..

7   ……………………..

8   ……………………..

9   ……………………..

10   ……………………..

11   ……………………..

12   ……………………..

13   ……………………..

14   ……………………..

15   ……………………..

Exercise 2: Read the sentences. Circle the correct answers.

1. I like__________ because I like reading stories.
A. literature                           B. math                       C. physics                              D. biology

2. I like to learn about plants and how they grow. I like__________.

A. IT                                       B. biology                  C. history                               D. math

3. I like computers. That's why I like__________.
A. IT                                       B. P.E                          C. history                               D. physics
4. I love to learn about mountains and rivers. I like__________.
A. IT                                       B. physics                  C. English                              D. geography
5. I don't like running and playing sports. I don't like__________.
A. literature                           B. P.E                          C. math                                  D. history

6. Studying __________ helps me learn about countries around the world and famous people in the past.
A. music                                 B. history                   C. biology                              D. math

7. I love to learn how light, heat, and sound work. I love__________.
A. geography                         B. biology                  C. physics                              D. music

 

Exercise 3. Find the words.

1.   We use it to write. It is a ............................................ ( p N E p E N ).

2.   We write our exercises in it. It is an ........................................(O R C O X B E I E S K E K C R E S B I o E E O X).

3.   We colour our drawings with a coloured .................................. (I L E N P C I N C P E L).

4.   We can read many texts in this. It is a ............................................ (B O O  K O K O B).

5.   We use it to cut paper at school. It is a pair of ........................ ( S S S R C O S I S I S C S S O R).

6.   We need ........................(A S M C E O P S S S E C S A M P S O) to draw a perfect circle.

7.   I've bought some ....................................... (G U E L U G E L) to stick things in my book.

8.   I am copying the English lesson on the ....................................  (O R A B D R D B A O ).

All the pupils will see it.

9.   You need to buy a new ............................................ (U T A L A R O C L C O R T U C C A L L A); You have a hard math exercise to do.

10. My pen, pencil, coloured pencils, and eraser are in my gorgeous ……………………… (E N p E C C I L A S E I C E A S L C P N).

 

Exercise 4. Fill in the blanks using the words in the box.

geography

history

arts and crafts

drama club (x2)

math

literature

 

and

author

subject

indoor activities

fantasy

sign up

novel

 

        

1.      Why don't you ................................... or an outdoor activity? Being outdoors is great for your health.

2.      Mary doesn't like ................................... Because she gets a headache every time she does her homework on it.

3.      My favorite ................................... at school is literature.     

4.      We learn about different countries in ................................... class.

5.      Volleyball and table tennis are ................................ We often play them in the sports center.

6.      My favorite book is The Secret Garden. The  ................................... is Frances Hodgson Burnett.

7.      We have English, math...................... science on Tuesday.

8.       Jane likes acting. She joined the ................................... at school.

9.      My favorite subject is ................................... I like learning about people in the past.

10. Harry Potter is a famous ................................... series. Many people love the magical world in the books.

11. There are many ................................... projects before the holidays. You can learn how to make beautiful cards and decorations.

12. Her first ................................... is about her childhood in the south of India. Many people, especially girls and women, love it because they can see themselves in her story.

13. Matt doesn't like ................................... He thinks all the books he has to read in the class are boring.

14. The …………………………………….  is looking for actors for their new play. 

Exercise 5: Read the description and write the correct numbers beside the pictures.

geography

music

English

history

art

science

math

IT

biology

drama

PE

 

1. You learn how to sing and listen to famous composers like Beethoven and Mozart.

2. You learn about numbers and find out how to calculate.

3. You learn about past events and famous people from long time ago.

4. You learn about computer, word-processing, databases and spreadsheets.

5. You learn how to speak, write and understand English.

6. You stretch, bend, run and jump.

7. You try to draw and paint like Picasso.

8. You learn how to act and perform on stage.

9. You learn about chemistry and physics.

10. You study human body and animals.

11. You learn about different areas and countries, as well as the world's weather, mountains, seas and lakes, etc..

III. GRAMMAR

 

Exercise 1: Complete the table below by adding “–ing” into the end of verbs:

V

V-ing

V

V-ing

Play (chơi)

 

Work (làm việc)

 

Stand (đứng)

 

Ask (hỏi/ yêu cầu)

 

Talk (nói)

 

Write (viết)

 

Sit (ngồi)

 

Make (làm)

 

Read (đọc)

 

Take (lấy)

 

Speak (nói)

 

Use (dùng)

 

Open (mở)

 

Put (đặt/để)

 

Help (giúp đỡ)

 

Leave (rời khỏi)

 

Run (chạy)

 

Draw (vẽ)

 

Have (có)

 

Walk (đi bộ)

 

Do (làm)

 

Move (di chuyển)

 

Say (nói)

 

Come (đến)

 

Go (đi)

 

Find (tìm thấy)

 

Give (cho)

 

Sell (bán)

 

Follow (theo dỏi)

 

Watch (xem)

 

 

 

Exercise 2: Give the correct form of verbs.

1.  Dogs ..............................meat and bones.         

(like/eat)

2.  My cat ..............................on my bed.

(like/sleep)

3.  Monkeys  ..............................trees.       

(like/climb)

4.  Rhinos      ..............................in the river.        

(like/swim)

5.  The giraffe ..............................leaves.   

(like/eat)

6.  Zebras  ..............................on the plains.          

(like/run)

7.  A zebra  ..............................on the plains.        

(like/run)

8.  Elephants ..............................water.

(like/drink)

Exercise 3: Replace the personal pronouns by possessive pronouns

1. The pictures are ..............................

(she)

2. In our garden is a bird. The nest is  ..............................

(it)

3. Your daughter is playing with ..............................

(she)

4. This book is ..............................

(you)

5. The ball is ..............................

(I)

6. The blue house is ..............................

(we)

7. The bag is ..............................      

(she)

8. This bag is ..............................     

(he)

9. This is their project, that is .............................. 

(we)

10. There are bees in our garden. The hive in this tree is ..............................

(they)

11. This was not my mistake. It was ..............................  

(you)

12. This calculator is ..............................

(you)

13. The doll is  ..............................

(I)

14. We met Peter and Marry last afternoon. This garden is  ..............................

(they)

15. The hat is ..............................

(he)

Exercise 4: Choose the correct word for each sentence.

1. Is this cup ___________________ ?

(your / yours)

2. The coffee is _________________.

(my/mine)

3. That coat is ___________________ .

(my/mine)

4. He lives in ___________________ house.    

(her/hers)

5. You might want ________________phone.

(your/yours)

6. The new car is _________________ .

(their/theirs)

7. She cooked ___________________  food.

(our/ours)

8. Don't stand on _________________foot!

(my/mine)

9. She gave him __________________ suitcase.

(her/hers)

10. I met ________________________ mother.

(their/theirs)

11. Is this _______________________ coffee?

(their/theirs)

12. Is the flat ______________________?

(her/hers)

13. The grey scarf is _________________ .      

(my/mine)

14. That red bike is _________________ .        

(our/ours)

15. We should take __________________coats.

(our/ours)

16. That is _______________________ car.

(my/mine)

17. He dropped ____________________           bag.

(my/mine)

18. Are these phones ________________ ?

(their/theirs)

19. These cakes are __________________!

(our/ours)

20. Are those children _______________ ?

(your/yours)

 

Exercise 5: Choose the best answer to complete the sentence.

1. That book belongs to me. It is ............................... .

A. mine

B. hers

C. theirs

D. his

2. This chair belongs to my mum. This chair is ................................

A. theirs

B. his

C. hers

D. yours

3.  ............................... does Jane have science? - On Monday and Friday.

A. Where

B. What

C. When

D. What time

4. What's your favorite subject? ............................... is biology.

A. Yours

B. Mine

C. Its

D. His

5.These CDs belong to me. They are............................... .

A. ours

B. theirs

C. mine

D. his

6 Is this your hat? Is it............................... ?

A. your

B. yours

C. hers

D. mine

7. That is my cat. That is............................... .

A. hers

B. mine

C. his

D. theirs

8This is your pencil. This is............................... .

A. hers

B. mine

C. yours

D. his

9. This is her present. This is...............................

A. yours

B. hers

C. his

D. mine

10. Jane has already done her work, but I'm saving ........................... until later.

A. hers

B. her

C. mine

D. my

11. How is your first week .......................... school?

A. on

B. at

C. for

D. to

12. My brother often helps me........................my homework.

A. at

B. about

C. for

D. with

13.This is her office. This is ..........................

A. mine

B. his 

C. hers

D. his

14. That is my pen. It is ..........................

A. mine

B. hers

C. ours

D. yours

15.This is our house. This house is ...........................

A. theirs

B. hers

C. ours

D. yours

 

 

 

 

Exercise 5: Write the correct words.

1.      My favorite sport is tennis. What’s…………….. mine/ yours?      - I like soccer.

2.      I found a bag. Is it ……………..mine/ yours?            - No, it isn't. My bag is here.

3.      This book isn't my book.…………….. Mine/Yours is blue. Is it yours?   - Yes, it is.

4.      I saw a red hat on the table. Isn't ……………..yours/mine red?     - No, mine is blue.

5.      What's your favorite ice cream?…………….. Mine/Yours is chocolate.  - I like chocolate, too.

6.      Do you have a ruler? ……………..Mine/Yours is at home.            - Sure, here you are

7.      I like art, English, ……………..and/or music.

8.      What's your favorite subject? ……………..Mine/ Yours is biology.

9.      Do you like ……………..play/playing sports?

10. The book's written…………….. by/on Harper Lee.

11. I think the book ……………..is/are very exciting.

12. I like ……………..dancing/danceing. I want to sign up for a dance class.

13. Do you know where my bag is? - Hmm, is that ……………..mine/yours?

14.  I don't like ……………..draw/drawing

15.  

IV. READING

Exercise 1: Read the following passage and choose the best answer

My dream school

My dream school is a quiet school (1) ................................ we have just two or three hours a day, in the morning. Then, in the afternoon, we can do many (2)  ................................  like singing, dancing, playing soccer, basketball, rugby. We won’t have tests and mark either. The teachers will not (3)  ................................ homework, so we can do whatever we want after school. In my dream school, we can also choose the (4)  ............................... we want: for example, you’re not going to learn mathematics or physics if you hate (5) .................................. So it’s a free school where you can learn with calm and serenity and you can make lots of friends during afternoon activities!

1.       

A. what

B. where

C. when

D. how

2.       

A. subjects

B. actions

C. activities

D. acts

3.       

A. give

B. take

C. do

D. get

4.       

A. class

B. classrooms

C. classmates

D. classes

5.       

A. it

B. them

C. her

D. him

                                   

Exercise 2: Read the text carefully, then answer the questions.

Hi, I’m Linda. I’m in the sixth grade. Today is my first day at secondary school. In the morning I put on my new uniform and get my new bag.

My best friend and I walk to school together. We are both very nervous and excited. When we get school, we are shown into our classroom with our new teacher. It is quite scary because I don’t know most of the children. Then we go to our first lesson. We have lots of different subjects and the lessons are really fun. My favourite subjects are art and English.

I really like my new school, all my teachers are lovely, the lessons are really interesting and I enjoy my first day. I can’t wait to go back tomorrow!

Questions:
1. What grade is Linda in?             

ð ………………………………………………………………………………………

2. Who does she go to school with?                     

ð ………………………………………………………………………………………

3. What are the lessons like?                     

ð ………………………………………………………………………………………

4. Why does Linda feel scary?      

ð ………………………………………………………………………………………

5. What are her favourite subjects?         

ð ………………………………………………………………………………………

 

Exercise 3: Read the article about Boston. Choose the best word (A, B, or C) for each space.

School Clubs

We have lots of fun clubs at our school. If you like outdoor activities, the Soccer Club meets at 4 p.m. every Tuesday, with the Tennis Club at the same time on Thursdays. For indoor activities, the Board Games Club starts next week. It is popular so please sign up on the noticeboard. The Book Club welcomes anyone who likes reading. You don't need to sign up but please bring your own copy of The Secret Garden with you to the Library at 4 p.m. on Wednesday. Our Arts and Crafts Club is for people who like making things. The cost is $20 per term for materials.

 

Sentences

True

False

1. If you like outdoor activities, you can join in the Soccer Club and Tennis Club.

 

 

2. Board Games Club has outdoor activities.

 

 

3. You need to sign up to take part in the Book Club.

 

 

4. Arts and Crafts Club welcomes anyone who likes reading.

 

 

5. You need to pay $20 per term for materials when you join the Art and Crafts Club.

 

 

6. There are five clubs in the writer’s school.

 

 


Exercise 4: Read about students’ favourite subjects then do the reading practice

 

What is your favourite subject?

Math is my favourite subject. I’m

good at it! I like problems and sums.
In my school we’ve got math every day.

Alec

I'm not good at math. I don’t like it! My favourite subject is history. I want to learn about life in the past!

Winnie

I'm not good at history or geography. I'm good at sports. I can play football and basketball. I can swim too. My favourite subject is PE! We play games and it's fun!

Ron

My favourite subject is English. I like music too. I want to learn English to sing songs! I've got English at half past eleven on Monday, Wednesday and Friday.

Ben

My favourite subject is art. I haven’t got tests in my art lessons! I’ve got art on Friday. It’s my favourite day of the week!

Julie

My favourite subject is geography. My geography teacher is great. I want to learn about lots of places around the world!

Lolly

 

Reading 1: Match each student with their favourite subject and the reason why they like it.

1.Alec

Geography

I haven’t got tests.

 

2.Winnie

English

I’m good at it.

 

3.Lolly

PE

My teacher is great.

 

4.Ron

Art

We play games and it’s fun.

 

5.Ben

Math

I want to learn about the past.

 

6.Julie

History

I want to sing songs.

 

Reading 2: Read again and complete.

1.      Winnie isn’t good at .................................................

2.      Ron can play .................................... and .................................

3.      Ben has got English at ............................... on Monday, ....................... and Friday.

4.      Julie’s favourite day of the week is ......................................

5.      Lolly likes ............................ and she wants to learn about lots of ................... around the world!

 

V. SPEAKING

Exercise 1. Sarah is talking to Julia. Match the questions with the answers.

1.Look! There's the list of school clubs. Let's see it!

2.That's great! I'll join the club.

3. Oh, come on! You can play basketball on Thursdays.

4.Oh really?

5.Well, there's a Book club.

6.You’re my best friend.

7.Yeah, it's on Tuesdays at 5 o'clock.

8. I don't like outdoor activities.

9. I love reading so I will join with you.

10. I don't like school clubs.

Your answer: 1………       2……….        3………..       4……..           5………

Exercise 2. You want to sign up for some clubs for next year. Find out what activities your partner likes doing and then decide on one club to join together.

Let's Join a Club!

Club

The Book Club

The badminton

Club

The Piano Club

The Board Games Club

The soccer

Club

Activities

Indoor

Outdoor

Indoor

Indoor

Outdoor

Where to meet

in the school library

At school stadium

In the music room

At school canteen

At school yard

Requires

No need to sign up, bringing a book

$20 for uniform

Having a piano at home

Signing up on the noticeboard

$20 for uniform

Time table

3 p.m. on Saturday

5 p.m. every Friday

Every  Tuesday afternoon

Every Saturday morning

4 p.m. every Saturday and Sunday

My favourite club is………………………………………………………………………

It is ………………………activities club. ………………….. meets at (where) …….….. ………………………………………(when)…………………………………………….

It requires you to …………………………………………………………………………

Because …………………………………………………………………………………..,

I will join the club with ………………………………………………………………..…

Now, let’s sign up for it.

VI. WRITING

Exercise 1: Write full questions and answers using the given words and your own ideas.

1. Which/ club/ you/ want/ sign up?

ð ……………………………………………………………………………………………

2. There's/ table tennis club./ Do/ you/ like/ play/ table tennis?

ð ……………………………………………………………………………………………

3. There's/ science club./ Do/ you/ like/ science?

ð ……………………………………………………………………………………………

4. Why/ don't/ you/ sign up/ it?

ð ……………………………………………………………………………………………

 

Exercise 2: Read Rita and Robert's information. Write a note to suggest which club they should sign up for and why. Write 40 to 50 words.

 

Name: Rita Williams
Favorite subjects: literature, P.E.

üreading books
   playing table tennis

û acting

 

 

School Clubs

□ science club
□ arts and
□ crafts club
□ indoor
□ sports club
□ IT. club
□ outdoor
□ sports club
□ book club
□ drama club

 

I think Rita should sign up for ……..

………………………………………......

………………………………………......

………………………………………......

………………………………………......

………………………………………......

………………………………………......

………………………………………......

………………………………………......

………………………………………......

………………………………………......

………………………………………......

………………………………………......

………………………………………......

………………………………………......

 

 

Name: Robert Lee
Favorite subjects: math, biology

ü playing soccer
     working with plants and animals

û doing arts and crafts 

 

Exercise 3: Rearrange the words to complete the sentences.

1. a library./ The school has/ and/ a computer room

ð The school ………………………………………………………………………………

2. secondary/ first/ your/ at/ school/ is/ how/ week/?

ð How………………………………………………………………………………………

3. geography class/We learn/ about/ different countries in/.

ð We………………………………………………………………………………………

4. art/ creative/ are/ drawings/ students/ the/ some/ doing/ in/ club/.

ð Some……………………………………………………………………………………

5. There's/ like/ science club./a/ Do/ you/ science/?

ð There's…………………………………………………………………………………

6. on the Green Grass/ is/ My favorite book/ Yellow Flowers/.

ð My………………………………………………………………………………………

7. There's/ club./ table tennis/ you/ Do/ a/ like/ playing/ table tennis?

ð There's……………………………………………………………………………………

8. school/ at/ English/ we/ have/ classes/ don’t/ today/.

ð We………………………………………………………………………………………

9. sign up/ for an outdoor/ Why don't you/ activity/?

ð Why……………………………………………………………………………………

10. children/ first/ on/ most/ school/ excited/ are/ day/ of/ the/.

ð Most………………………………………………………………………………………

Exercise 4: Make sentences, using the words and phrases given.

1.      This/the first week/my new school

ð This…………………………………………………………………………………

2.      I/ usually/ my homework/ the school library

ð I usually………………………………………………………………………………

3.      I/ lots of friends/ and they/ all nice/ me

ð I have…………………………………………………………………………………

4.      We/ many subjects/ and my favorite subject/ science

ð We have………………………………………………………………………………

5.      In the afternoon/I/ sports/ the playground

ð In the…………………………………………………………………………………

Exercise 4: Write the correct possessive pronoun for each sentence.

1.      That pen belongs to those students.

ð That pen……………………………………………………………………………

2.      This car belongs to my neighbor John.

ð This car……………………………………………………………………………

3.      This ring belongs to my aunt Helen.

ð This ring……………………………………………………………………………

4.      This pencil belongs to you.

ð This pencil……………………………………………………………………………

5.      This motorbike belongs to me and my cousin.

ð This motorbike…………………………………………………………………………

6.   These shoes belong to my mother.

ð These shoes……………………………………………………………………………

7.   Those books belong to my sister's friends.

ð Those books……………………………………………………………………………

8.   These hats belong to you and your wife.

ð These hats……………………………………………………………………………

9.   That bag belongs to me.

ð That bag……………………………………………………………………………

10. That car belongs to my aunt and uncle.

That car……………………………………………………………………………

0
17 tháng 10 2021


 gfvbgf h10b4.16,h 5g1 b n nbnvh1hfyfty

17 tháng 10 2021

1005 làm j nằm trong dãy số đó,theo quy luật ko cs số 1005

17 tháng 10 2021

\(A=2+2^2+2^3+...+2^{2021}\)

\(2A=2^2+2^3+2^4+...+2^{2021}\)

\(2A-A=\left(2^2+2^3+2^4+...+2^{2021}\right)-\left(2+2^2+2^3+...+2^{2021}\right)\)

\(A=2^2+2^3+2^4+...+2^{2021}-2-2^2-2^3-...-2^{2021}\)

\(A=2^{2021}-2\)