除以angularjs中的和不能正确计算

Question

我有一个很小的角度js片段。我可以得到总和很好，但是一旦我添加了除法，它就无法正确计算。关于如何解决总和除法的任何建议？

function LoginController($scope) {

}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.22/angular.min.js"></script>
<div ng-app ng-controller="LoginController">
     <input type="radio" ng-model="color.name1" value="1">
    Red
  </label><br/>
  <label>
    <input type="radio" ng-model="color.name2" ng-value="2">
    Green
  </label><br/>
  <label>
    <input type="radio" ng-model="color.name3" value="3">
    Blue
  </label><br/>
  

  
    <h1> Sum: {{color.name1--color.name2--color.name3 / 3 }}! </h1>
    
</div>

Answer 1

{{（color.name1 - color.name2 - color.name3）/ 3}}

function LoginController($scope) {

}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.22/angular.min.js"></script>
<div ng-app ng-controller="LoginController">
     <input type="radio" ng-model="color.name1" ng-value="1">
    Red
  </label><br/>
  <label>
    <input type="radio" ng-model="color.name2" ng-value="2">
    Green
  </label><br/>
  <label>
    <input type="radio" ng-model="color.name3" ng-value="3">
    Blue
  </label><br/>
  

  
    <h1> Sum: {{(color.name1--color.name2--color.name3) / 3 }}! </h1>
    
</div>