Gọi số HS lần lượt là a;b;c 

vì số HS tỉ lệ nghich với thời gian

a.2=b.2,5 =c.3 hay \(\frac{a}{\frac{1}{2}}=\frac{b}{\frac{2}{5}}=\frac{c}{\frac{1}{3}}=\frac{a-c}{\frac{1}{2}-\frac{1}{3}}=\frac{10}{\frac{1}{6}}=60\)

a =60.1/2=30

b=60.2/5 =24

c=60.1/3 =20

Bạn ý đang online đấy , ko nhanh là bạn ý nghỉ đó nha

• I can make a difference in our community because I do volunteer work.

• I’ve made many new friends and feel much more self-confident.

sai ở từ and thay bằng từ but

sai ở từ that chuyển thành those nha

To help my community better, I can volunteer for local initiatives like cleaning parks, supporting food banks, or tutoring students. Organizing community events or awareness campaigns on important issues like health and sustainability can also make a positive impact. Small acts of kindness, such as helping neighbors with errands, can build stronger bonds and improve the overall well-being of the community.

tham khảo:

I enjoy practicipating in volunteer activities. I always service the volunteer in the summer. Last summer, my classmate and I hung out to do some volunteering. First, I taught children english and other subjects. We helped them played some games, it was funny. Then, we helped farmer collect their harvest. Some of us planted trees along the street and cleaned the village. I think last summer was very intereting because we have helped poor people. I hope this summer, I and you will do volunteer activities in the countryside.