Bạn có thể làm những cách sau để giúp cùi gỗ dễ cháy khi đun nấu:

- Phơi khô củi trước khi sử dụng

- Chẻ củi thành thanh nhỏ

- Xếp củi hợp lý

- Dùng mồi lửa tốt

- Cung cấp đủ oxy

Tóm tắt:

|--------|--------|--------|

C----------------B-------A

Lời giải:

Vì vận tốc của 2 xe là 2/3

A và B cách nhau 45km, cùng gặp nhau tại C (theo tóm tắt)

Do đó quãng đường từ A đến C là:

\(45\times3=135\left(\operatorname{km}\right)\)

Vận tốc ô tô đi từ A là:

\(135:3=45\) (km/h)

Vận tốc ô tô đi từ B là:

\(45\times\frac23=30\) (km/h)

Đáp số: 45km/h và 30km/h

Độ dài của chiều cao hình thang là:

\(\left(26+24\right):2=25\left(m\right)\)

Diện tích hình thang là:

\(\left(26+24\right)\times25:2=625\left(m^2\right)\)

Đáp số: \(625m^2\)

Thời gian con đà điểu chạy hết 3145m là:

\(3145:17=185\left(giây\right)\)

Đổi 185 giây = 3 phút 5 giây

Đáp số: 3 phút 5 giây

\(\frac{6}{-x}=\frac{30:5}{60:5}=\frac{6}{12}\)

Do đó: \(x=-12\)

Part 1:

Part 2:

1. Last week, Tom won the first prize in our school English contest.

2. How lovely the baby is!

3. VTV1 attracts many viewers. It has a lot of interesting programs.

4. We like coming to this gym because the equipment is great.

5. Mary can speak English very fluently.

Part 3

1. B. "enjoys" → enjoy

2. B. "and" \(\rightarrow\) but

3. C. "is" \(\rightarrow\) is it

4. A, "world golf champion" → a world golf champion.

5. A. "start" → started

Part 5:

Tết holiday is celebrated on the first day of the Lunar New Year in Vietnam. Some weeks before the New Year, the Vietnamese clean their house and paint the walls. New clothes are bought for the occasion. One or two days before the festival, people make Banh Chung, which is the traditional cake, and kinds of jam. On New Year's Eve, the family get together for a reunion dinner. Every member of the family should be present during the dinner in which many different kinds of dishes are served. On the New Year morning, the young member of the family pay their respects to the elders. And the children receive lucky money.

Part 1:

Part 2:

1. Last week, Tom won the first prize in our school English contest.

2. How lovely the baby is!

3. VTV1 attracts many viewers. It has a lot of interesting programs.

4. We like coming to this gym because the equipment is great.

5. Mary can speak English very fluently.

Part 3

1. B. "enjoys" → enjoy

2. B. "and" \(\rightarrow\) but

3. C. "is" \(\rightarrow\) is it

4. A, "world golf champion" → a world golf champion.

5. A. "start" → started

Part 5:

Tết holiday is celebrated on the first day of the Lunar New Year in Vietnam. Some weeks before the New Year, the Vietnamese clean their house and paint the walls. New clothes are bought for the occasion. One or two days before the festival, people make Banh Chung, which is the traditional cake, and kinds of jam. On New Year's Eve, the family get together for a reunion dinner. Every member of the family should be present during the dinner in which many different kinds of dishes are served. On the New Year morning, the young member of the family pay their respects to the elders. And the children receive lucky money.

Part 1:

Part 2:

1. Last week, Tom won the first prize in our school English contest.

2. How lovely the baby is!

3. VTV1 attracts many viewers. It has a lot of interesting programs.

4. We like coming to this gym because the equipment is great.

5. Mary can speak English very fluently.

Part 3

1. B. "enjoys" → enjoy

2. B. "and" \(\to\) but

3. C. "is" \(\to\) is it

4. A, "world golf champion" → a world golf champion.

5. A. "start" → started

Part 5:

Tết holiday is celebrated on the first day of the Lunar New Year in Vietnam. Some weeks before the New Year, the Vietnamese clean their house and paint the walls. New clothes are bought for the occasion. One or two days before the festival, people make Banh Chung, which is the traditional cake, and kinds of jam. On New Year's Eve, the family get together for a reunion dinner. Every member of the family should be present during the dinner in which many different kinds of dishes are served. On the New Year morning, the young member of the family pay their respects to the elders. And the children receive lucky money.

Thời gian An đến nhà Mai là: 19 giờ 30 phút + 30 phút = 20 giờ

=> Đáp số là B

Sorry, sửa lại

Tổng của 2 số là: \(67\times2=134\)

Số còn lại là: \(134-54=80\)

Đáp số: 80