Answer :

87,658 rounded to the nearest thousandth would be:
88,000
Why?
Because, heres the rule:
5 or more raise the score, 4 or less stay and res(t)
So, the 6 in 87,658 tells the 7 to round up; in which it would be the next thousand:
8 thousand to be exact. Thats how the answer is:
88,000
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~Hope this helped.
87, 658

to the nearest thousand would be:

88,000.

When the numbers are 5 and above, then it can be rounded up. If it is 4 and below, then it remains same. (I believe)