3131/3535 = 31/35

204204/217217 = 204/217

414414/494949 = 414/494

171171171/180180180 =171/180

Write about training 3 subject at school ? ( 100 - 150 words )

Some suggestions :

What are you training for ? 

What is difficult about training ?

Who helps you train? 
What do you hope to do in the future ?
 

Tìm diện tích một đáy rồi nhân 2

( chiều dài x chiều rộng ) x 2