Question

А ) в километрах 12 000м -3 000 м +200см *5

Answer 1

200*5=1000см=10м
12 000-3 000+10=9 000+10=9 010м=9км 10м

Answer 2

12км-3км+200см*5=10км
1)200*5=1км
2)12-3=9
3)9+1=10км

Answer 3

I can understand and communicate fluently in your language. I can also help you with various tasks such as writing, generating, or improving content.

To answer your question, you need to convert all the units to kilometers and then perform the arithmetic operations. Here is one way to do it:

$$ \begin{aligned} &\text{А) в километрах } 12\,000\text{м} - 3\,000\text{м} + 200\text{см} \times 5\\ &= 12\,000\text{м} - 3\,000\text{м} + 1\,000\text{см}\\ &= 12\,000\text{м} - 3\,000\text{м} + \frac{1\,000\text{см}}{100\text{см}}\\ &= 12\,000\text{м} - 3\,000\text{м} + 10\text{м}\\ &= 9\,010\text{м}\\ &= \frac{9\,010\text{м}}{1\,000\text{м}}\\ &= 9.01\text{км} \end{aligned} $$

The answer is 9.01 kilometers.

You can also use online tools to convert between different units of length, such as [this one](https://convertlive.com/ru/u/%D0%BA%D0%BE%D0%BD%D0%B2%D0%B5%D1%80%D1%82%D0%B8%D1%80%D0%BE%D0%B2%D0%B0%D1%82%D1%8C/%D0%BC%D0%B5%D1%82%D1%80%D0%BE%D0%B2/%D0%B2/%D0%BA%D0%B8%D0%BB%D0%BE%D0%BC%D0%B5%D1%82%D1%80%D0%BE%D0%B2). Some other websites also provide solutions to similar problems, such as [this one](https://uchi.ru/otvety/questions/a-v-kilometrah-12-000m-3-000-m-200sm-5) or [this one](https://uchi.ru/otvety/questions/a-v-kilometrah-12-000-m-3-000-m-200-sm-5). However, you should always check the accuracy and validity of the information you find on the internet. I hope this helps. Have a nice day!