ai dung minh tick 3 tich cho

\(Q=\left(x+y\right)\left(x-2021\right)\\ Q=\left(3021-1994\right)\left(3021-2021\right)=1027\cdot1000=1027000\)

Số cần điền lớn hơn 3021  và nhỏ hơn 3026 nên số cần điền chỉ có thể là 3022;3023;3024;3025.
Số 3022 có tổng các chữ số là 7. Vì 7 không chia hết cho 99 nên 3022 không chia hết cho 99.

Số 3023 có tổng các chữ số là 8. Vì 8 không chia hết cho 9 nên 3023 không chia hết cho 99.

Số 3024 có tổng các chữ số là 9. Vì 9 chia hết cho 9 nên 3024 chia hết cho 9.

Số 3025 có tổng các chữ số là 10. Vì 10 không chia hết cho 9 nên 3025 không chia hết cho 9.
Vậy đáp án đúng điền vào ô trống là 3024.

a) 1010  >  999              b) 60 phút   =  1 giờ

     2361 >  3021                 982 m  < 1 km

a) 1010 > 999

2361 < 3021

b) 60 phút = 1 giờ

982m < 1 km

Tham khảo!

In the future, I would like to live in a better world. First and for most, there will be no homeless people, no poverty and social vices. All people will have jobs and income to live on their own. As a result, the rate of unemployment will decrease. Secondly, people in the world will live in peace, no war, no violence and inequality. All nations will join hands to build a whole new world. Furthermore, the world’s citizens will utilize environment friendly equipment. Instead of burning fossil fuels for energy, people use alternatives like wind and solar power. Electric vehicle will replace nowadays vehicle to reduce air pollution, electricity will be generated by wind, solar panels or wave without damaging the environment. Besides, modern systems of public transport run by electricity will be developed to stop congestions and with higher speed,they can help people to commute faster and attract them to use more. And last but not least, I’d like my world to be friendly to nature. More trees and flowers will be grown everywhere, deforestations will disappear and the endangered species will be protected thoroughly. Although my wanted world seems to be difficult to achieve, but I believe that when we join hands and make efforts, nothing is impossible

 Em thao khảo nhé

  Technology has been progressing at a great rate over the past few decades. I think that in a few centuries, the world will be very different.

    Perhaps, in the year 3021, the world will be entirely computerized. Every household will have a mainframe which linked to all other systems. Adults don't have to go to work and children need not to go to school as everything can be done at home. Probably, by then, humans will not even have to take food in the form of meat, vegetables and rice to survice. Tablets containing the ideal proportion of the essential nutrients will be enough for us.

     Robots could become so cheap that every household could afford a few of them. Life will be easy and comfortable will all the household chores being done by the robots. Visiting relatives during New Year will not be nessary any more. All that the Vietnamese need to do is switch on the mainframe and exchange greetings through the big screen. Children could still get their "ang pows", but not directly. The money will be credited to their bank accounts using the mainframe.

    I think in the year 3021, people will use energy from nature like solar energy, wind, hydrogen instead of coal and oil. All these changes are just my own idea of what life in the future could be like.

    I wonder if they will come true.

For me, the future is not an unpredictable thing. With the flow of the world and all of the present technology, people may partially guess what will happen in the next decade or even the next century. Life in the future may be more advanced and comfortable than what we are been through, but it may also have some negative impacts from this generation. As we might know, population and global warming are getting out of our hands, and people from the future may suffer from the worse consequences than us at the moment. They can live in a smart house with serving robots and interactive households, but they might step out to the dark clouds and polluted air from the factories. High technology and modern gadgets may be great and useful for them, but they worth their health and a clean fresh environment to live. I hope human will find a way to protect the nature, so out next generation can both live comfortable and healthily in the future.