0100 + =
Code <!DOCTYPE html>
<html>
<body>
<form id="frm" oninput="x.value=eval(a.value)+parseFloat(b.value)">
0<input type="range" id="a" value="50">100 + <input type="number" id="b" value="50"> = <output id="x"></output>
</form>
<script>
onload=function(){
with(frm){
x.value=eval(a.value)+parseFloat(b.value);
}
}
</script>
</body>
</html>