diff --git a/exercicios/para-casa/__pycache__/cod.cpython-311.pyc b/exercicios/para-casa/__pycache__/cod.cpython-311.pyc
new file mode 100644
index 0000000..08f778c
Binary files /dev/null and b/exercicios/para-casa/__pycache__/cod.cpython-311.pyc differ
diff --git a/exercicios/para-casa/cod.py b/exercicios/para-casa/cod.py
new file mode 100644
index 0000000..719e6b8
--- /dev/null
+++ b/exercicios/para-casa/cod.py
@@ -0,0 +1,6 @@
+def calculaMedia(lista):
+    if not lista:
+        return 0
+    
+    return sum(lista) / len(lista)
+
diff --git a/exercicios/para-casa/teste.py b/exercicios/para-casa/teste.py
new file mode 100644
index 0000000..2de4fc6
--- /dev/null
+++ b/exercicios/para-casa/teste.py
@@ -0,0 +1,26 @@
+import unittest
+
+from cod import calculaMedia
+
+class testCalculaMedia(unittest.TestCase):
+    def test_media_lista_vazia(self):
+        resultado = calculaMedia([])
+        self.assertEqual(resultado, 0)
+
+    def test_media_lista_string_float(self):
+         resultado = calculaMedia(['1.0', 2.0, 3.0])
+         self.assertEqual(resultado, 2)
+    
+    def test_media_lista_int_float(self):
+        resultado = calculaMedia([1, 2.0, 3.0])
+        self.assertEqual(resultado, 2.0)
+
+    def test_media_lista_tupla_lista(self):
+        resultado = calculaMedia([('10'), 20, 30])
+        self.assertEqual(resultado,[('10'), 20])
+
+if __name__ == '__main__':
+    unittest.main()
+
+# se a lista tiver uma entrada em str
+# se 
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diff --git a/exercicios/para-sala/soma.py b/exercicios/para-sala/soma.py
new file mode 100644
index 0000000..6e6fca3
--- /dev/null
+++ b/exercicios/para-sala/soma.py
@@ -0,0 +1,56 @@
+def soma(a,b):
+    return a + b
+
+def sub(a,b):
+    return a - b
+
+def mult(a,b):
+    return a * b
+
+def div(a,b):
+    return a / b
+
+import unittest
+
+class testSoma(unittest.TestCase):
+    def test_soma_positivos(self):
+        self.assertEqual(soma(2,3),5)
+
+    def test_soma_negativos(self):
+        self.assertEqual(soma(-3,-3),-6)
+    
+    def test_soma_zero(self):
+        self.assertEqual(soma(0,0),0)
+
+class testSub(unittest.TestCase):
+    def test_sub_positivos(self):
+        self.assertEqual(sub(4,2),2)
+
+    def test_sub_negativos(self):
+        self.assertEqual(sub(-3,-3),0)
+    
+    def test_sub_zero(self):
+        self.assertEqual(sub(0,-2),2)
+
+class testMult(unittest.TestCase):
+    def test_mult_positivos(self):
+        self.assertEqual(mult(2,3),6)
+
+    def test_mult_negativos(self):
+        self.assertEqual(mult(-3,-3),9)
+    
+    def test_mult_zero(self):
+        self.assertEqual(mult(5,0),0)
+
+class testDiv(unittest.TestCase):
+    def test_div_positivos(self):
+        self.assertEqual(div(10,5),2)
+
+    def test_div_negativos(self):
+        self.assertEqual(div(-10,-5),2)
+    
+    def test_div_zero(self):
+        self.assertEqual(div(0,-5,),0)
+
+if __name__ == '__main__':
+    unittest.main()
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