Answer:
Ok, let's follow the steps:
1 million + 257 million = 258 million
258 million - 1090 million = -832 million
Now, I'm not sure what you mean by "add the remainder", since we don't have any remainder to add. However, if you meant "add the absolute value of the remainder", we can do that. The absolute value of -832 million is 832 million. So, adding that to our result, we get:
-832 million + 832 million = 0
Therefore, the final result is 0.