diff --git a/Duckling/Numeral/PL/Corpus.hs b/Duckling/Numeral/PL/Corpus.hs
index 252c4578..9dd0794d 100644
--- a/Duckling/Numeral/PL/Corpus.hs
+++ b/Duckling/Numeral/PL/Corpus.hs
@@ -98,6 +98,22 @@ allExamples = concat
              [ "5 tysięcy"
              , "pięć tysięcy"
              ]
+  , examples (NumeralValue 79)
+             [ "siedemdziesiąt dziewięć"
+             , "siedemdziesięciu dziewięciu"
+             ]
+  , examples (NumeralValue 84)
+             [ "osiemdziesiąt cztery"
+             , "osiemdziesiat cztery"
+             , "osiemdziesięciu czterem"
+             , "osiemdziesieciu czterem"
+             ]
+  , examples (NumeralValue 92)
+             [ "dziewięćdziesiąt dwa"
+             , "dziewiecdziesiat dwa"
+             , "dziewięćdziesięciu dwóm"
+             , "dziewiecdziesieciu dwom"
+             ]
   , examples (NumeralValue 122)
              [ "sto dwadzieścia dwa"
              ]
diff --git a/Duckling/Numeral/PL/Rules.hs b/Duckling/Numeral/PL/Rules.hs
index 612632a8..74935e41 100644
--- a/Duckling/Numeral/PL/Rules.hs
+++ b/Duckling/Numeral/PL/Rules.hs
@@ -60,6 +60,33 @@ ruleSixty = Rule
   , prod = \_ -> integer 60
   }
 
+ruleSeventy :: Rule
+ruleSeventy = Rule
+  { name = "seventy"
+  , pattern =
+    [ regex "siedemdziesi((a|ą)t|(e|ę)ci(u|oma))"
+    ]
+  , prod = \_ -> integer 70
+  }
+
+ruleEighty :: Rule
+ruleEighty = Rule
+  { name = "eighty"
+  , pattern =
+    [ regex "osiemdziesi((a|ą)t|(e|ę)ci(u|oma))"
+    ]
+  , prod = \_ -> integer 80
+  }
+
+ruleNinety :: Rule
+ruleNinety = Rule
+  { name = "ninety"
+  , pattern =
+    [ regex "dziewi(e|ę)(c|ć)dziesi((a|ą)|(e|ę))(t|ci(u|oma))"
+    ]
+  , prod = \_ -> integer 90
+  }
+
 ruleIntersectWithAnd :: Rule
 ruleIntersectWithAnd = Rule
   { name = "intersect (with and)"
@@ -552,6 +579,7 @@ rules =
   , ruleDozen
   , ruleEight
   , ruleEighteen
+  , ruleEighty
   , ruleEleven
   , ruleFifteen
   , ruleFifty
@@ -567,6 +595,7 @@ rules =
   , ruleMultiply
   , ruleNine
   , ruleNineteen
+  , ruleNinety
   , ruleNumeral
   , ruleNumeral2
   , ruleNumeral3
@@ -582,6 +611,7 @@ rules =
   , ruleOne
   , ruleSeven
   , ruleSeventeen
+  , ruleSeventy
   , ruleSingle
   , ruleSix
   , ruleSixteen
diff --git a/tests/Duckling/Numeral/PL/Tests.hs b/tests/Duckling/Numeral/PL/Tests.hs
index 83e907b8..4c852e79 100644
--- a/tests/Duckling/Numeral/PL/Tests.hs
+++ b/tests/Duckling/Numeral/PL/Tests.hs
@@ -8,7 +8,6 @@
 module Duckling.Numeral.PL.Tests
   ( tests ) where
 
-import Prelude
 import Data.String
 import Test.Tasty