Kết quả là 61/18 hay 3 , 38 nha !

61/18 hoặc 3 , 38 

a - b + 31344

Thay a = 23 và b= 32490  vào biểu thức a - b + 313 44 ta có:

   a - b + 31344 = 23 - 32490 + 31344

                         = (23 + 31344) - 32490

                        = 31367 - 32490

                       =  - 1123

-1123

giúp mình nhanh nhé mai mình nộp rồi!!!

Exercise 9: Write question for the underlined words:

1. I often go shopping with my friends in my free time.

sdsg=> ............What do you often do in your free time?..............................................................................

2. Lan goes to the library twice a week.

sdsg=> ...How often does Lan go to the library?.......................................................................................

3. The go camping by bus.

sdsg=> ..How do they go camping?........................................................................................

4. Yes. She sometimes talks to her friends on the phone.

sdsg=> .......................Does she sometimes talks to her friends on the phone?..................................................................

5. She usually watches TV in the evening.

sdsg=> .........What does she usually do in the evening?.................................................................................

6. They have English lessons three times a week.

sdsg=> ......How often do they have English lessons?....................................................................................

7. My mother gets up at 6 a.m every day. 

sdsg=> ..What time does your mother get up every  day?........................................................................................

8. Nam has Maths on Tuesday and Thursday.

sdsg=>.....When does Nam have Maths?.......................................................................................

9. My parents live in a small house in Da Nang.

sdsg=> ..Where do your parents live?........................................................................................

10. Her address is 102, Nguyen Trai Street, Ha Noi.

sdsg=> ..What is her address?........................................................................................

Exercise 10: Read and answer the questions.5

          My name is Huong. I usually get up at six o’clock in the morning. I domorning exercise with my father before breakfast. I have a big breakfast withmy family at 7 o’clock. After breakfast, my sister and I walk to school. Afterschool, I often play badminton with my friends. I play badminton three times aweek. Then I go home and help my mother cook dinner. I have dinner with myfamily at 6.30 p.m. Next, I usually do my homework. After finishing myhomework, I sometimes listen to music of surf the Internet to look for someinformation. I usually go to bed at 9 o’clock.

1. What’s her name?

sdsg=> ..........Her name is Huong................................................................................

2. What time does she usually get up in the morning?

sdsg=> ......She usually gets up at 6 o'clock in the morning....................................................................................

3. What does she do before breakfast?

sdsg=> ......She does morning exercise with her father before breakfast....................................................................................

4. Who does she go to school with?

sdsg=> .........She goes to school with her sister.................................................................................

5. Does she often play soccer after school?

sdsg=> .............No, she doesn't.............................................................................

6. How often does she play badminton?

sdsg=> .............She plays badminton three times a week.............................................................................

7. What does she usually do after dinner?

sdsg=> .She usually does her homework after dinner.........................................................................................

8. Does she sometimes surf the Internet in the evening?

sdsg=> .Yes, she does.........................................................................................

9. What time does she go to bed?

sdsg=> .................She goes to bed at 9 o'clock.........................................................................

Quả thứ hai nặng số kg là:

2,5 + 1,76 = 4,26 (kg)

Hai quả nặng số kg là:

4,26 + 2,5 = 6,76 (kg)

Đáp số: ...

Quả thứ hai nặng số kg là:

2,5 + 1,76 = 4,26 (kg)

Hai quả nặng số kg là:

4,26 + 2,5 = 6,76 (kg)

Đáp số: 6,76

Exercise 7. Circle the underlined word or phrase that needs correcting.sdsg1. (A) How many (B) lessons (C) does she (D) has today?

sdsg=>......has => have............................................................................

2. (A) My flat is (B) on the (C) three (D) floor of Ha Noi Tower.

sdsg=>.............three => third....................................................................

3. (A) Where (B) does (C) your sister (D) lives?sdsg=>............lives => live......................................................................

4. My mother (A) go (B) to work (C) at half past seven (D) every morning.

sdsg=>.......go => goes...........................................................................

5. She (A) likes (B) ride a bike (C) to the zoo (D) every weekend.

sdsg=>...............ride => riding...................................................................

6. Hoa and Nam often (A) go (B) to school (C) by foot (D) every day.

sdsg=>...................by => on...............................................................

7. We (A) visit (B) our hometown (C) one (D) a year

dsg=>......................one => once............................................................

. I often work (A) at (B) my English (C) projects (D) in the evening

sdsg=>..............at => on....................................................................

9. Giang and Hoa (A) don’t (B) has English (C) on (D) Mondays

sdsg=>............has => have......................................................................

10. (A) How often (B) does Nam (C) plays computer (D) games?sdsg=>............plays => play......................................................................

Exercise 8: Reorder the words to make sentences.sdsg

1. she/ her/ always/ teeth/ getting/ after/ brushes/ up/.sdsg=> .

......She always brushes her teeth after getting up...................................................................................

2. she/ usually/ is/ for/ school/ late.sdsg=>

.......She is usually late for school...................................................................................

3. shopping/ does/ with/ she/ her/ like/ friends/?sdsg=>

........Does she like shopping with her friends..................................................................................

4. often/ does/ bed/ go/ your/ to/ mother/ early/ ?sdsg=>

..........Does your mother often go to bed early................................................................................

5. do/ evening/ in/ home/ you/ go/ the/ early/ ?sdsg=> .................Do you go home early in the evening.........................................................................

6. countryside/ the/ my/ in/ live/ a/ parents/ big/ in/ house/.sdsg4

=> .....My parents live in a big house in the countryside.....................................................................................

7. after/ your/ work/ what/ do/ father/ does/ ?sdsg=> ........What does your father do after work?..................................................................................

8. swimming/ she/ how/ often/ does/ go/ ?sdsg=> ...................How often does she go swimmin.......................................................................

9. live/ far/ centre/ from/ we/ city/ the/.sdsg=> ........We live far from the city center..................................................................................

10. soccer/ school/ I/ my/ often/ friends/ play/ after/ with/.sdsg=> .............I often play soccer with my friends after school..........................................................

giúp mình nhanh nhé mai mình nộp rồi!!!

?????????????? đọc xong ong đầu luôn

ƯCLN (a,b)=b

Chúc bạn học tốt

Lời giải:
1. 

Xét tứ giác $HNMK$ có $\widehat{HNK}=\widehat{HMK}=90^0$. Mà 2 góc này cùng nhìn cạnh $HK$ nên $HNMK$ là tứ giác nội tiếp.

$\Rightarrow H,N,M,K$ cùng thuộc 1 đường tròn.

2.

Xét tứ giác $INPM$ có tổng 2 góc đối nhau $\widehat{INP}+\widehat{IMP}=90^0+90^0=180^0$ nên $INPM$ là tứ giác nội tiếp.

$\Rightarrow I,N, P,M$ cùng thuộc 1 đường tròn.

Hình vẽ:

Đáp án:

5,5kg=5500g

bước 1

-bỏ quả cân 500g lến đĩa 1

-đổ hết gạo vào 2 đĩa sao cho cân thăng bằng

ta được ở đĩa 2:

(5500+500):2=3000g

bước 2:

chia đều 3000g vào 2 đĩa

ta được:

3000:2=1500g

đổi ra

1500g=1.5kg

vậy ta lấy được 1.5 kg

cảm ơn nhìu:))

Em cảm ơn

27 và 29