lời giải như thế nào bn

Hôm nay olm.vn sẽ hướng dẫn em giải dạng toán nâng cao, toán tổng hiệu ẩn hiệu, cấu trúc thi hsg, thi chuyên, violympic.

  Bước 1: tìm hiệu

  Bước 2: giải toán tổng hiệu bình thường

  Bước 3 : kết luận

                            Giải

Ta có sơ đồ: 

Theo sơ đồ ta có hiệu hai số là: 2 \(\times\)(3-1) + 2 = 6

Số chẵn bé là: (58 -6): 2 = 26

Số chẵn lớn là: 26 + 6 = 32

Đs..

Thử lại ta có: Tổng hai số 26 + 32 = 58 (ok)

           Giữa chúng có: 27; 29; 31 ( 3 số lẻ ok)

Vậy kết quả đúng.

cô thương hoài giải dễ hiểu ghê

1 create $\rightarrow$ c. energy (tạo ra năng lượng)

2 drive $\rightarrow$ a. machinery (vận hành máy móc)

3 generate $\rightarrow$ e. electricity (phát/tạo ra điện)

4 turn $\rightarrow$ b. turbines (quay tua-bin)

5 heat $\rightarrow$ d. houses (sưởi ấm nhà cửa)

b

1 How many types of energy sources are mentioned in the text? What are they?
$\rightarrow$ Two types of energy sources are mentioned. They are renewable and non-renewable energy sources. (hoặc kể tên cụ thể: fossil fuels/coal/oil, hydro power, nuclear power, wind power, solar power)

2 What are the disadvantages of hydro and nuclear power?
$\rightarrow$ Hydro power is expensive to build dams, and nuclear power can be very dangerous.

3 Why do you think the wind and the sun are called alternative sources of energy?
$\rightarrow$ Because they are clean, renewable, and can be used instead of non-renewable sources (fossil fuels).

4 What types of energy does Viet Nam use most?
$\rightarrow$ Viet Nam uses hydro power and fossil fuels (coal, gas, oil) most.

5 What does the professor think Viet Nam will use more in the future?
$\rightarrow$ He thinks Viet Nam will use more renewable energy sources like solar and wind power in the future.

1 số nhỏ nhất viết với các chữ số 5 chia hết cho 3 thì tổng các chữ số của số đó chia hết cho 3 ta có:3 . 5 =15

tổng viết bởi các số 5 tổng các chữ số là 15 là 555

558558

Me: What are you doing on Sunday afternoon?

Friend: I’m not doing anything. / Nothing much.

Me: Do you want to see a movie with me?

Friend: Sure. What movie is it?

Me: It's "The Journey to Mars".

Friend: What time does it start?

Me: It starts at 4 p.m.

Friend: Great! See you then.

Me: What are you doing on Saturday morning?

Friend: I’m free.

Me: Would you like to go to the movies with me?

Friend: Sounds good. What movie do you want to watch?

Me: How about "The Forest Book"?

Friend: What time is it on?

Me: It's at 10 a.m.

Friend: OK, let's meet at the cinema at 9:45.

`x:3/6=5/6`

`x=5/6xx3/6`

`x=15/36`

a)  x : 3/6 = 5/6  

     x = 5/6 x 3/6

     x= 15/36

Do you use solar energy in your home?

People won't use flying cars until the year 2050

We must always obey the traffic rules for our safety 

The major cause of death for children living in the slums is malnutrition

Solar panels will be installed on the roof of our house next week

Veronica is a good friend of mine

Pollution is the most serious problem

0,5m=5dm

45,2cm=4,52dm

a) 5        b)4,52          c)24,3       d) 24,5