Answer:
4000
Explanation:
If we were to take the number 3,635 and round it to the nearest thousand, we can do it like this.
Start with 5. (Ones place)
3,635
5 is rounded to 10.
Now work on the number 4. (Tenths place)
3,640
4 is rounded to 0.
And now we can do the number 6. (Hundreds place)
3600
6 is rounded to 10.
If we look at the number now, it is
4000
3.635 rounded to the nearest thousand is 4000.