diff --git a/exercicios/para-casa/calculatormult.py b/exercicios/para-casa/calculatormult.py
new file mode 100644
index 0000000..d8421e1
--- /dev/null
+++ b/exercicios/para-casa/calculatormult.py
@@ -0,0 +1,21 @@
+import unittest
+
+def multiplication(a,b):
+    return a*b
+        
+class TestingMultiplication(unittest.TestCase):   
+    def test_multiplication_positive(self):
+        self.assertAlmostEqual(multiplication(4, 2), 8)    
+                                   
+    #def test_multiplication_negative(self):
+    #    self.assertAlmostEqual(multiplication(-2, -2), -4)
+    
+    def test_multiplication_zero(self):
+        self.assertAlmostEqual(multiplication(0, 444), 0)
+        
+    def test_multiplication_positive_negative(self):
+        self.assertAlmostEqual(multiplication(5, -2), -10)
+    
+    
+if __name__=="__main__":
+    unittest.main()
\ No newline at end of file
diff --git a/exercicios/para-casa/calculatorsub.py b/exercicios/para-casa/calculatorsub.py
new file mode 100644
index 0000000..af9d2f7
--- /dev/null
+++ b/exercicios/para-casa/calculatorsub.py
@@ -0,0 +1,21 @@
+import unittest
+
+def subtraction(a,b):
+    return a-b
+        
+class TestingSubtraction(unittest.TestCase):   
+    def test_subtraction_positive(self):
+        self.assertAlmostEqual(subtraction(44, 22), 22)    
+                                   
+    def test_subtraction_negative(self):
+        self.assertAlmostEqual(subtraction(-14, -7), -7)
+    
+    def test_subtraction_zero(self):
+        self.assertAlmostEqual(subtraction(0, 4), -4)
+        
+    def test_subtraction_positive_negative(self):
+        self.assertAlmostEqual(subtraction(-5, 4), -9)
+    
+    
+if __name__=="__main__":
+    unittest.main()
\ No newline at end of file
diff --git a/exercicios/para-casa/calculatorsum.py b/exercicios/para-casa/calculatorsum.py
new file mode 100644
index 0000000..0174f0e
--- /dev/null
+++ b/exercicios/para-casa/calculatorsum.py
@@ -0,0 +1,22 @@
+import unittest
+
+def sum(a,b):
+    return a+b
+
+class TestingSum(unittest.TestCase):
+    def test_sum_positive(self):
+        self.assertAlmostEqual(sum(4,4),8)
+
+    def test_sum_negative(self):
+        self.assertAlmostEqual(sum(-4,-4),-8)
+    
+    def test_sum_zero(self):
+        self.assertAlmostEqual(sum(0,4),4)
+
+    def test_sum_negative_positive(self):
+        self.assertAlmostEqual(sum(5,-6), -1)
+
+
+if __name__=="__main__":
+    unittest.main()
+
diff --git a/exercicios/para-casa/division.py b/exercicios/para-casa/division.py
new file mode 100644
index 0000000..fe7ae1c
--- /dev/null
+++ b/exercicios/para-casa/division.py
@@ -0,0 +1,21 @@
+import unittest
+
+def division(a,b):
+    return a/b
+        
+class TestingDivision(unittest.TestCase):   
+    def test_division_positive(self):
+        self.assertAlmostEqual(division(44, 2), 22)    
+                                   
+    def test_division_negative(self):
+        self.assertAlmostEqual(division(-14, -7), 2)
+    
+    def test_division_zero(self):
+        self.assertAlmostEqual(division(0, 4), 0)
+        
+    def test_division_positive_negative(self):
+        self.assertAlmostEqual(division(-5, 2), -2.5)
+    
+    
+if __name__=="__main__":
+    unittest.main()
\ No newline at end of file
diff --git a/exercicios/para-casa/porcentage.py b/exercicios/para-casa/porcentage.py
new file mode 100644
index 0000000..22bf8ed
--- /dev/null
+++ b/exercicios/para-casa/porcentage.py
@@ -0,0 +1,23 @@
+#import unittest
+
+#def porcentage(a,b):
+#    return a%b
+        
+#class TestingPorcentage(unittest.TestCase):   
+    #def test_porcentage_positive(self):
+    #    self.assertAlmostEqual(porcentage(10, 10), 1) 
+                                   
+    # def test_porcentage_negative(self):
+    #     self.assertAlmostEqual(porcentage(-14, -7), 2)
+    
+    # def test_porcentage_zero(self):
+    #     self.assertAlmostEqual(porcentage(0, 4), 0)
+        
+    # def test_porcentage_positive_negative(self):
+    #     self.assertAlmostEqual(porcentage(-5, 2), -2.5)
+    
+    
+#if __name__=="__main__":
+#    unittest.main()
+
+#Foi uma tentativa.
\ No newline at end of file
diff --git a/exercicios/para-sala/calculator.py b/exercicios/para-sala/calculator.py
new file mode 100644
index 0000000..a35b768
--- /dev/null
+++ b/exercicios/para-sala/calculator.py
@@ -0,0 +1,23 @@
+import unittest
+
+def sum(a,b):
+    return a+b
+
+class TestingSum(unittest.TestCase):
+    def test_sum_positive(self):
+        self.assertAlmostEqual(sum(4,4),8)
+
+    def test_sum_negative(self):
+        self.assertAlmostEqual(sum(-4,-4),-8)
+    
+    def test_sum_zero(self):
+        self.assertAlmostEqual(sum(0,4),4)
+
+    def test_sum_negative_positive(self):
+        self.assertAlmostEqual(sum(5,-6), -1)
+        
+    
+
+
+if __name__=="__main__":
+    unittest.main()
\ No newline at end of file