diff --git a/exercicios/para-casa/__pycache__/calculo_media.cpython-311.pyc b/exercicios/para-casa/__pycache__/calculo_media.cpython-311.pyc
new file mode 100644
index 0000000..292d2c0
Binary files /dev/null and b/exercicios/para-casa/__pycache__/calculo_media.cpython-311.pyc differ
diff --git a/exercicios/para-casa/calculo_media.py b/exercicios/para-casa/calculo_media.py
new file mode 100644
index 0000000..dc6c464
--- /dev/null
+++ b/exercicios/para-casa/calculo_media.py
@@ -0,0 +1,7 @@
+numeros = [6, 5, 9, 8]
+
+def calcular_media(numeros):
+    if not numeros:
+        return 7
+    
+    return sum(numeros) / len(numeros)
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diff --git a/exercicios/para-casa/soma.py b/exercicios/para-casa/soma.py
new file mode 100644
index 0000000..a123360
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+++ b/exercicios/para-casa/soma.py
@@ -0,0 +1,36 @@
+def soma (a, b):
+    return a + b
+
+def subtracao (a, b):
+    return a - b
+
+def multiplicacao (a, b):
+    return a * b
+
+def divisao (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(-5, -3), -8)
+
+class TestSubtracao(unittest.TestCase):
+    def test_subtracao(self):
+        self.assertEqual(subtracao(5, 3), 2)
+
+class TestMultiplicacao(unittest.TestCase):
+    def test_multiplicacao(self):
+        self.assertEqual(multiplicacao(5, 3), 15)
+
+class TestDivisao(unittest.TestCase):
+    def test_divisao(self):
+        self.assertEqual(divisao(4, 2), 2)
+
+
+if __name__ == '__main__':
+    unittest.main()
\ No newline at end of file
diff --git a/exercicios/para-casa/test_calculoMedia.py b/exercicios/para-casa/test_calculoMedia.py
new file mode 100644
index 0000000..ce3f787
--- /dev/null
+++ b/exercicios/para-casa/test_calculoMedia.py
@@ -0,0 +1,10 @@
+import unittest 
+from calculo_media import calcular_media
+
+class TestCalcularMedia(unittest.TestCase):
+    def test_media_lista(self):
+        resultado = calcular_media([6, 5, 9, 8])
+        self.assertEqual(resultado, 7)
+
+if __name__ == '__main__':
+    unittest.main()
\ No newline at end of file