Visualforce Formula Compilation Error

OpportunityController.apxc

public class OpportunityController {
    public Opportunity[] getOpps() {
        return [SELECT Name, Amount FROM Opportunity LIMIT 10];
    }
}

OpportunityList.vfp

<apex:page controller="OpportunityController">
    <apex:dataTable value="{!opps}" var="opp">
        <apex:column headerValue="Opp Name" value="{!opp.Name}" />
        <!-- The following line will not compile:
          <apex:column headerValue="Amount (Thousands)" value="{!opp.Amount / 1000}" />
        -->
        <apex:column headerValue="Amount (Thousands)">
            {!opp.amount / 1000}
        </apex:column>
    </apex:dataTable>
</apex:page>