<html>
<head>
<title>Pertambahan</title>
<script type="text/javascript">
function tambah(){
var num1 = document.myform.angka1.value;
var num2 = document.myform.angka2.value;
var pertambahan = parseInt(num2) + parseInt(num1);
document.getElementById('add').value = pertambahan;}
</script>
</head>
<body>
<FORM NAME="myform">
<h1><b><center>PERTAMBAHAN</center></b></h1>
<br></br>
<input type="text" name = "angka1"> + <input type="text" name = "angka2"><INPUT TYPE="button" NAME="samadengan" Value="=" onClick="tambah()"/><input type = "text" id = "add" name = "hasil" value= "">
</FORM>
</body>
</html>
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