title: Calulate two random numbers in flutter
body: <p>I'm trying to generate two different random numbers and add those together, but Flutter doesn't seem to like my math. I keep getting the message that '+' isn't defined for the class Random.</p>
  
  <pre><code>import 'package:flutter/material.dart';
  import 'dart:math';
  
  void main() =&gt; runApp(MaterialApp(
        title: 'Random Numbers',
        theme: ThemeData(primarySwatch: Colors.orange),
        home: MyHome(),
      ));
  
  class MyHome extends StatefulWidget {
    @override
    _MyHomeState createState() =&gt; _MyHomeState();
  }
  
  class _MyHomeState extends State&lt;MyHome&gt; {
    @override
    Widget build(BuildContext context) {
      var num1 = new Random();
      for (var i = 0; i &lt; 10; i++) {
        print(num1.nextInt(10));
      }
      var num2 = new Random();
      for (var i = 0; i &lt; 10; i++) {
        print(num2.nextInt(10));
      }
      //var sum = num1 + num2;
  
      return Container();
    }
  }
  </code></pre>
  
  <p>My goal is to display it something like this: "2 + 5 = "
  where the user will fill in the answer. If correct do this else do that.</p>