diff --git a/index.js b/index.js
index e69de29..afd8418 100644
--- a/index.js
+++ b/index.js
@@ -0,0 +1,28 @@
+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 inc(n) {
+  return n+=1;
+}
+function dec(n) {
+  return n-1;
+}
+function makeInt(n) {
+  return parseInt(n,10);
+}
+
+function preserveDecimal(n) {
+  return parseFloat(n);
+}