18 : 0, 24

= 18 : 24/100

= 18 : 6/25

= 18 . 25 : 6 

= 75

75 nhé bạn( câu này mình nghĩ bạn tự tính đc)

lấy máy tính mà bấm

In my opinion, today's teenagers need to play sports more. Sports are very beneficial to health, it enhances resistance, helps us to get sick less, helps us to live. The wait is more fun, less judgmental. In addition, teenager is also the most active and healthy age, there are old people who still want to do sports, so there is something ominous about teenagers. This is just my opinion, what about you?

Bạn cần bài nào vậy bạn?

bài 3

dài quá

a: Xét ΔABC có 

M là trung điểm của bC

I là trung điểm của AC

Do đó: MI là đường trung bình của ΔABC

Suy ra: MI=AB/2=3(cm)

Chọn một trong mấy cái đó à bạn ?

đúng vậy

I am usually in habit of reading books. Addition to books that offer me much useful information,I also comic book. I am in fond of it for some following reasons.

To begin with, Comic books bring me a great deal of relaxation. One of them is Doremon story, which tells many funny short stories about 2 main characters, Doremon and Nobita,Who are close friends. The author of that comic creats so many amusing situations among characters that I can”t help laughing. It”s actually a hard-to-put-down book. It attracts not only children but also adults as me.

Another good point of it I want to mention about is creative imagination. I mean children need to have imaginative mindset, which helps them be more active in life.

By and large, comic book is worth reading after hard work. It is nice for everyone.

\(\dfrac{-1}{9}.\dfrac{-3}{5}+\dfrac{5}{-6}.\dfrac{-3}{5}-\dfrac{7}{2}.\dfrac{3}{5}\\=\dfrac{1}{9}.\dfrac{3}{5}+\dfrac{5}{6}.\dfrac{3}{5}-\dfrac{7}{2}.\dfrac{3}{5}\\ =\dfrac{3}{5}\left(\dfrac{1}{9}+\dfrac{5}{6}-\dfrac{7}{2}\right)\\ =\dfrac{3}{5}.\dfrac{-23}{9}\\ =-\dfrac{23}{15}\)