Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
1 : Hoang_____his email four times a week in order not to miss anything important.
A. checks B. will check C. is checking D. check
2 : Nowadays, people_____social networks with more and more caution.
A. uses B. are using C. used D. use
3 : At the moment, my sister_____her homework, my brother_____games.
A. is making - is playing B. is doing - is playing
C. does - plays D. makes - is playing
4 : It’s 7.00 p.m. now and we_____meal together. We usually_____dinner at that time.
A. have - eat B. have - are eating C. are having - eat D. are having - are eating
5 : I_____a bike to school every day but today I_____to school by bus because it was stolen yesterday.
A. rode - went B. ride - am going C. ride - go D. is riding - am going
6 : That Hoa_____in class affects other students around.
A. always talk B. is always talking C. always talks D. always talking
7 : Hoang and Phong_____football as they’re having class now.
A. don’t play B. are playing C. doesn’t play D. aren’t playing
8 : Hoa usually_____charge of doing the washing-up in her family.
A. takes B. is taking C. take D. will take
9 : Our friends_____for the fashion show now.
A. is preparing B. are preparing C. prepares D. prepare
10 : All staff in this restaurant_____an urgent meeting right now.
A. are attending B. is attending C. attends D. attend
11 : After the physics lesson, the children know that water_____at 100 Degrees C.
A. will boil B. is boiling C. boils D. boil
12 : My mom_____to the supermarket every Sunday for shopping.
A. goes B. go C. is going D. are going
13 : Look! Minh_____on stage. She looks so beautiful.
A. sings B. are singing C. is singing D. sang
14 : Bich sometimes_____chicken noodle soup for breakfast.
A. are having B. is having C. have D. has
15 : Who_____the guitar in that room, Hoa?
A. playing B. is playing C. play D. plays
16 : Jenny often_____jeans and T-shirt at school but she_____a gorgeous dress today.
A. wears - is wearing B. is wearing - wears
C. wear - is wearing D. wears - wears
17 : First thing in the morning, I_____a cup of milk tea.
A. has B. am having C. have D. will have
18 : Ms. Kim_____very well when she’s under pressure.
A. not work B. don’t work C. isn’t working D. doesn’t work
19 : I’m sorry. Lan is busy now. She_____her document on the second floor.
A. are checking B. check C. checks D. is checking
20 : Hurry up, Linh. Other friends_____for us.
A. are waiting B. waits C. wait D. is waiting
21 : My clothes are not in the room. They_____them away.
A. take B. have taken C. took D. are taking
22 : She_____for 10 hours! You must wake her up.
A. sleeps B. is sleeping C. has been sleeping D. slept
23 : David_____the TV set at the moment. He_____at it for one hour or so.
A. is repairing/ has worked B. repairs/has been working
C. has repaired/has been working D. repairs/worked
24 : David_____his hands. He just_____the TV set.
A. washes/has just repaired B. is washing/has just been repairing
C. is washing/ has just repaired D. has washed/ has just repaired
25 : Why_____?_____you his anecdotes?
A. are you laughing/has Jim told B. are you laughing/has Jim been telling
C. have you laughed/ has Jim told D. have you laughed/ has Jim been telling
1. | A. better | B. prefer | C. teacher | D. worker |
2. | A. near | B. hear | C. dear | D. bear |
3. | A. concert | B. concern | C. collect | D. combine |
4. | A. picture | B. culture | C. neighbour | D. tourist |
5. | A. dependent | B. enjoy | C. absent | D. government |
5. | A. future | B. return | C. picture | D. culture |
6. | A. first | B. girl | C. bird | D. sister |
7. | A. burn | B. sun | C. hurt | D. turn |
8. | A. nurse | B. surf | C. picture | D. return |
10. A. hot | B. hour | C. hotel | D. hobby |
1. | A. better | B. prefer | C. teacher | D. worker |
2. | A. near | B. hear | C. dear | D. bear |
3. | A. concert | B. concern | C. collect | D. combine |
4. | A. picture | B. culture | C. neighbour | D. tourist |
5. | A. dependent | B. enjoy | C. absent | D. government |
5. | A. future | B. return | C. picture | D. culture |
6. | A. first | B. girl | C. bird | D. sister |
7. | A. burn | B. sun | C. hurt | D. turn |
8. | A. nurse | B. surf | C. picture | D. return |
10. A. hot | B. hour | C. hotel | D. hobby |
1ab + 36 = ab1
100 + ab + 36 = ab.10 + 1
Cùng bớt 2 vế đi ab + 1 ta được :
135 = ab .9
=> ab = 135 :9
<=> ab = 15
vậy số phải tìm là 15.
1ab + 36 = ab1
100 + ab + 36 = ab.10 + 1
Cùng bớt 2 vế đi ab + 1 ta được:
135 = ab . 9
=> ab = 135 : 9
=> ab = 15
Vậy số phải tìm là 15
Đề bài yêu cầu tìm ab?
1ab+36=ab1
<=>100+10a+b+36=100a+10b+1
<=>90a+9b=135
Xét: a=1 => b=5
a=2 => b<0 (loại)
=> Nhận a=1 và b=5
Phép tính ban đầu: 115 + 36= 151
ta có ab1 - 36 = 1ab
xét từ hàng đơn vị : 1-6 = 5
thay b =5 ta có a51-36=1a5
vì 1 trừ 6 bằng 5 nhớ 1 nên trả 1 vào 3
có 5-4=1
vậy suy ra a=1
vậy a=1 b=5
hoàn thành phép tính : 115+36=151
duyệt nhé có gì sai chỉ bảo thêm !!!
Chúc bạn học giỏi!!!
\(\overline{1ab}+36=\overline{ab1}\)
\(100+\overline{ab}+36=10\overline{ab}+1\)
\(100+36-1=9\overline{ab}\)
\(135=9\overline{ab}\)
\(\overline{ab}=135:9\)
\(\overline{ab}=15\)
