diff --git a/01_-_Inputs.hs b/01_-_Inputs.hs
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index 0000000..0169739
--- /dev/null
+++ b/01_-_Inputs.hs
@@ -0,0 +1,10 @@
+{-
+    func1 n
+    
+    @takes      An integer number
+    @returns    The value of n
+    @examples   func1 3 == 3
+                func2 5 == 5
+-}
+func1 :: Integer -> Integer
+func1 = \n -> n
\ No newline at end of file
diff --git a/02_-_Arithmetic-Operations.hs b/02_-_Arithmetic-Operations.hs
new file mode 100644
index 0000000..f6e6c2d
--- /dev/null
+++ b/02_-_Arithmetic-Operations.hs
@@ -0,0 +1,87 @@
+{-
+    add m n
+
+    @takes      Two integer numbers
+    @returns    The addition of the two numbers
+    @examples   add 1 2 == 3
+                add 4 5 == 9
+-}
+add :: Integer -> Integer -> Integer
+add = \m n -> m + n
+
+{-
+    minus m n
+
+    @takes      Two integer numbers
+    @returns    The subtraction of the two numbers
+    @examples   minus 2 1 == 1
+                minus 8 5 == 3
+-}
+minus :: Integer -> Integer -> Integer
+minus = \m n -> m - n
+
+{-
+    multiply m n
+
+    @takes      Two integer numbers
+    @returns    The multiplication of the two numbers
+    @examples   multiply 2 1 == 2
+                multiply 3 2 == 6
+-}
+multiply :: Integer -> Integer -> Integer
+multiply = \m n -> m * n
+
+{-
+    divide m n
+
+    @takes      Two numbers
+    @returns    The division of the two numbers
+    @examples   divide 4 2 == 2.0
+                divide 6 4 == 1.5
+-}
+divide :: Double -> Double -> Double
+divide = \m n -> m / n
+
+{-
+    divide' m n
+
+    @takes      Two integer numbers
+    @returns    The division of the two numbers, but rounded result
+    @examples   divide' 4 2 == 2
+                divide' 6 4 == 1
+-}
+divide' :: Integer -> Integer -> Integer
+divide' = \m n -> m `div` n
+
+{-
+    modulus m n
+
+    @takes      Two integer numbers
+    @returns    The modulus of the two numbers
+    @examples   modulus 2 3    == 2
+                modulus 2 (-3) == -1
+-}
+modulus :: Integer -> Integer -> Integer
+modulus = \m n -> m `mod` n
+
+{-
+    remainder m n
+
+    @takes      Two integer numbers
+    @returns    The remainder from the quotient
+    @examples   remainder 2 3    == 2
+                remainder 2 (-3) == 2
+-}
+remainder :: Integer -> Integer -> Integer
+remainder = \m n -> m `rem` n
+
+{-
+    quotient m n
+
+    @takes      Two integer numbers
+    @returns    The quotient of the two numbers
+    @examples   quotient 8 4 == 2
+                quotient 7 3 == 2
+-}
+quotient :: Integer -> Integer -> Integer
+quotient = \m n -> m `quot` n
\ No newline at end of file