diff --git a/index.js b/index.js
index e69de29bb..bd8f3a649 100644
--- a/index.js
+++ b/index.js
@@ -0,0 +1,31 @@
+function add(a, b){
+  return (a + b);
+}
+
+function subtract(a, b){
+  return (a - b);
+}
+
+function multiply(a, b){
+  return (a * b);
+}
+
+function divide(a, b){
+  return (a / b);
+}
+
+function increment(n){
+  return (n + 1);
+}
+
+function decrement(n){
+  return (n - 1);
+}
+
+function makeInt(n){
+  return parseInt(n, 10);
+}
+
+function preserveDecimal(n){
+  return parseFloat(n);
+}