Look at the hundreds digit. If it is 5 or more, round up. If less than 5, round down.<br><br>
&bull; 12 785: hundreds digit = 7<br>
&bull; Since 7 &ge; 5, round up the thousands from 12 to 13.<br>
&bull; Replace hundreds, tens, ones with zeros: 13 000.<br><br>
Final Answer: 13000