diff --git a/num2words/lang_DE.py b/num2words/lang_DE.py
index ca993bb..f681697 100644
--- a/num2words/lang_DE.py
+++ b/num2words/lang_DE.py
@@ -78,7 +78,9 @@ class Num2Word_DE(Num2Word_EU):
         ctext, cnum, ntext, nnum = curr + next
 
         if cnum == 1:
-            if nnum < 10 ** 6:
+            if nnum == 100 or nnum == 1000:
+                return ("ein" + ntext, nnum)
+            elif nnum < 10 ** 6:
                 return next
             ctext = "eine"
 
@@ -110,21 +112,35 @@ class Num2Word_DE(Num2Word_EU):
             if outword.endswith(key):
                 outword = outword[:len(outword) - len(key)] + self.ords[key]
                 break
-        return outword + "te"
+
+        res = outword + "te"
+
+        # Exception: "hundertste" is usually preferred over "einhundertste"
+        if res == "eintausendste" or res == "einhundertste":
+            res = res.replace("ein", "", 1)
+
+        return res
 
     def to_ordinal_num(self, value):
         self.verify_ordinal(value)
         return str(value) + "."
 
     def to_currency(self, val, longval=True, old=False):
-        hightxt = "euro"
-        lowtxt = "cent"
+        hightxt = "Euro"
+        lowtxt = "Cent"
         if old:
-            hightxt = "mark"
-            lowtxt = "pfennig/e"
+            hightxt = "Mark"
+            lowtxt = "Pfennig/e"
 
-        return self.to_splitnum(val, hightxt=hightxt, lowtxt=lowtxt,
-                                jointxt="und", longval=longval)
+        cents = int(round(val*100))
+        res = self.to_splitnum(cents, hightxt=hightxt, lowtxt=lowtxt,
+                               jointxt="und", longval=longval)
+
+        # Handle exception, in german is "ein Euro" and not "eins Euro"
+        if res.startswith("eins "):
+            res = res.replace("eins ", "ein ", 1)
+
+        return res
 
     def to_year(self, val, longval=True):
         if not (val // 100) % 10:
diff --git a/tests/test_de.py b/tests/test_de.py
index 0388b21..3c30dd8 100644
--- a/tests/test_de.py
+++ b/tests/test_de.py
@@ -52,6 +52,7 @@ class Num2WordsDETest(TestCase):
         )
 
     def test_cardinal_at_some_numbers(self):
+        self.assertEqual(num2words(100, lang='de'), "einhundert")
         self.assertEqual(num2words(2000000, lang='de'), "zwei millionen")
         self.assertEqual(num2words(4000000000, lang='de'), "vier milliarden")
         self.assertEqual(num2words(1000000000, lang='de'), "eine milliarde")
@@ -65,7 +66,7 @@ class Num2WordsDETest(TestCase):
         self.assertEqual(
             num2words(4500072900000111, lang='de'),
             "vier billiarden fünfhundert billionen " +
-            "zweiundsiebzig milliarden neunhundert millionen hundertelf"
+            "zweiundsiebzig milliarden neunhundert millionen einhundertelf"
         )
 
     def test_ordinal_num(self):
@@ -79,12 +80,28 @@ class Num2WordsDETest(TestCase):
         self.assertRaises(TypeError, num2words, 2.453, ordinal=True, lang='de')
 
     def test_currency(self):
-        self.assertEqual(num2words(12.00, to='currency', lang='de'),
-                         'zwölf euro')
+        self.assertEqual(num2words(1, lang='de', to='currency'),
+                         'ein Euro')
+        self.assertEqual(num2words(12, lang='de', to='currency'),
+                         'zwölf Euro')
+        self.assertEqual(num2words(12.00, lang='de', to='currency'),
+                         'zwölf Euro')
+        self.assertEqual(num2words(100.0, lang='de', to='currency'),
+                         "einhundert Euro")
+        self.assertEqual(num2words(190, lang='de', to='currency'),
+                         "einhundertneunzig Euro")
+        self.assertEqual(num2words(1.90, lang='de', to='currency'),
+                         "ein Euro und neunzig Cent")
+        self.assertEqual(num2words(3.4, lang='de', to='currency'),
+                         "drei Euro und vierzig Cent")
+        self.assertEqual(num2words(20.18, lang='de', to='currency'),
+                         "zwanzig Euro und achtzehn Cent")
+        self.assertEqual(num2words(3.04, lang='de', to='currency'),
+                         "drei Euro und vier Cent")
 
     def test_old_currency(self):
         self.assertEqual(num2words(12.00, to='currency', lang='de', old=True),
-                         'zwölf mark')
+                         'zwölf Mark')
 
     def test_year(self):
         self.assertEqual(num2words(2002, to='year', lang='de'),