diff --git a/04-fibonacci/index.js b/04-fibonacci/index.js
index 37c64cc..f2ec99f 100644
--- a/04-fibonacci/index.js
+++ b/04-fibonacci/index.js
@@ -1,4 +1,7 @@
 export function fibonacci(value) {
   // implementar logica aqui
-  
-}
\ No newline at end of file
+  if (value <= `${1}`) {
+    return value;
+  }
+  return fibonacci(value - 1) + fibonacci(value - 2);
+}
diff --git a/06-sum/index.js b/06-sum/index.js
index ebc2ee1..d071540 100644
--- a/06-sum/index.js
+++ b/06-sum/index.js
@@ -1,4 +1,8 @@
 export function sum(values) {
   // implementar logica aqui
-  
-}
\ No newline at end of file
+  function add(a, b) {
+    return a + b;
+  }
+  var soma = values.reduce(add, 0);
+  return soma;
+}