Ngày đầu bán được số gạo: 15. `1/3` = 5(tấn)

Số gạo còn lại sau ngày 1: 15 -5=10(tấn)

Ngày thứ hai bán được số gạo :10.`2/5`=4(tấn)

Ngày thứ ba bán được số gạo: 10-4=6(tấn)

A .Xanh vỏ, đỏ lòng

B. Gần mực thì đen ; gần đèn thì sáng

 Today, I want to tell you about studying abroad. I know most of people want to go to university next year. Why not go to university in another country? I went to university in France. It was a great experience. I studied there for one year. I could already speak some French, so I could make friends easily. I learned so much about French history.

However, there are some things about studying abroad that you might find difficult. You won't know your way around and might get lost. But universities will give you a map and tell you good places to go. It can also be very expensive to pay for your apartment and plane tickets. If anyone has any questions, please ask me.

Vi khuẩn là một nhóm sinh vật đơn bào, có kích thước nhỏ và thường có cấu trúc tế bào đơn giản không có nhân, bộ khung tế bào và các bào quan như ty thể và lục lạp

In the united states of america,the national language is (1)....also...english.Four hundred years ago,some english people came to noth america to live and they brought (2).....English....language to this country. Now in the usa people speak (3)....American....english.Most of the words are the (4).....same....in america and british english ,but the america say some englhish words not as people (5)...speak.......in england. Canada is (6)...situated.....to the North of the United states of america .It is the (7)..largest.....the united states.In canada ,many people (8).....speak.......english because they also came from england many years (9)....ago......But in some parts of canada,people speak (10)...French......because they came from France.