diff --git a/index.js b/index.js
index e69de29bb..3ce0ccbd7 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(a){
+  return a+=1;
+}
+
+function decrement(n){
+  return n-=1;
+}
+
+function makeInt(n){
+  return parseInt(n, 10);
+}
+
+function preserveDecimal(n){
+  return parseFloat(n);
+}