diff --git b/calculadora_no terminada.html a/calculadora_no terminada.html
new file mode 100644
index 0000000..fe63905
--- /dev/null
+++ a/calculadora_no terminada.html
@@ -0,0 +1,69 @@
+<!DOCTYPE html>
+<html>
+<head>
+	<title></title>
+	<style>
+		table{
+			width: 50%;
+			margin: auto;
+		}
+		td{
+			padding: 30px;
+		}
+	</style>
+	<script type="text/javascript">
+		var n = "";
+		var a1 = 0;
+		function capturar(a){
+			b = a;
+		}
+		function mostrar(){
+			var dis = document.getElementById("display");
+			
+			if (b=="1" || b=="2" || b=="3" || b=="4" || b=="5" || b=="6" || b=="7" || b=="8" || b=="9" || b=="0") {
+				n = n + b;
+				dis.innerHTML = n;
+			}
+			if (b=="+") {
+				dis.innerHTML = "";
+				a1 = a1 + parseInt(n);
+				n = "";
+			}
+			if (b=="-") {
+				dis.innerHTML = "";
+				if (a1!=0) {
+					a1 = a1 - parseInt(n);
+					n = "";
+				}
+			}
+			if (b=="x") {
+				dis.innerHTML = "";
+				a1 = a1 * parseInt(n);
+				n = "";
+			}
+			if (b=="=") {
+				dis.innerHTML = a1;
+			}	
+		}
+	</script>
+</head>
+<body>
+	<table border="1">
+		<tr>
+			<td colspan="4" id="display"></td>
+		</tr>
+		<tr>
+			<td onclick="capturar('1'); mostrar()">1</td><td onclick="capturar('2'); mostrar()">2</td><td onclick="capturar('3'); mostrar()">3</td><td onclick="capturar('+'); mostrar()">+</td>
+		</tr>
+		<tr>
+			<td onclick="capturar('4'); mostrar()">4</td><td onclick="capturar('5'); mostrar()">5</td><td onclick="capturar('6'); mostrar()">6</td><td onclick="capturar('-'); mostrar()">-</td>
+		</tr>
+		<tr>
+			<td onclick="capturar('7'); mostrar()">7</td><td onclick="capturar('8'); mostrar()">8</td><td onclick="capturar('9'); mostrar()">9</td><td onclick="capturar('x'); mostrar()">x</td>
+		</tr>
+		<tr>
+			<td onclick="capturar('0'); mostrar()" id="">0</td><td onclick="capturar('ce'); mostrar()"><-ce</td><td onclick="capturar('='); mostrar()" colspan="2">=</td>
+		</tr>
+	</table>
+</body>
+</html>
\ No newline at end of file
