diff --git a/src/main/py/logarithmic_and_expo_and_root_calculations.py b/src/main/py/logarithmic_and_expo_and_root_calculations.py
index dc181e1..98c53f4 100644
--- a/src/main/py/logarithmic_and_expo_and_root_calculations.py
+++ b/src/main/py/logarithmic_and_expo_and_root_calculations.py
@@ -15,3 +15,7 @@ def logarithmize(first_number, second_number):
 
 def logarithmize_dualis(first_number):
     return math.log2(first_number)
+
+
+def logarithmize_base_10(number):
+    return math.log10(number)
diff --git a/src/test/py/logarithmic_ann_expo_and_root_calculations.py b/src/test/py/logarithmic_ann_expo_and_root_calculations.py
index 930ed0c..2a9594e 100644
--- a/src/test/py/logarithmic_ann_expo_and_root_calculations.py
+++ b/src/test/py/logarithmic_ann_expo_and_root_calculations.py
@@ -21,6 +21,9 @@ class primitive_calculations(unittest.TestCase):
     def test_4_ld_equals_2(self):
         self.assertEqual(logarithmize_dualis(4), 2)
 
+    def test_10_log10_equals_1(self):
+        self.assertEqual(logarithmize_base_10(10), 1)
+
 
 if __name__ == "__main__":
     unittest.main()