diff --git a/activesupport/CHANGELOG b/activesupport/CHANGELOG
index f379aae5b91509ad261281f498aca884533c7a13..9437c4a1d79502a854dd863662d6c9fcea12de18 100644
--- a/activesupport/CHANGELOG
+++ b/activesupport/CHANGELOG
@@ -1,3 +1,5 @@
+* Added Byte operations to Numeric, so 5.5.megabytes + 200.kilobytes #461 [Marcel Molina]
+
 * Fixed that Dependencies.reload can't load the same file twice #420 [Kent Sibilev]
 
 * Added Fixnum#ago/until, Fixnum#since/from_now #450 [bitsweat]
diff --git a/activesupport/lib/core_ext.rb b/activesupport/lib/core_ext.rb
index d288fb7e310aa2df8da7a80a5d1e258bdf581a96..573313e74132f17455d890c39e6dd227e4f383dd 100644
--- a/activesupport/lib/core_ext.rb
+++ b/activesupport/lib/core_ext.rb
@@ -1 +1 @@
-Dir[File.dirname(__FILE__) + "/core_ext/*.rb"].each { |file| require(file) }
\ No newline at end of file
+Dir[File.dirname(__FILE__) + "/core_ext/*.rb"].each { |file| require(file) }
diff --git a/activesupport/lib/misc.rb b/activesupport/lib/misc.rb
index d2c3d4a045008dac70641a302ca725ab282737eb..1ca00db1e7fda45525b16aa773be653c5d1b0e44 100644
--- a/activesupport/lib/misc.rb
+++ b/activesupport/lib/misc.rb
@@ -6,27 +6,3 @@ def silence_warnings
     $VERBOSE = old_verbose
   end
 end
-
-class Hash
-  # Return a new hash with all keys converted to symbols.
-  def symbolize_keys
-    inject({}) do |options, (key, value)|
-      options[key.to_sym] = value
-      options
-    end
-  end
-
-  # Destructively convert all keys to symbols.
-  def symbolize_keys!
-    keys.each do |key|
-      unless key.is_a?(Symbol)
-        self[key.to_sym] = self[key]
-        delete(key)
-      end
-    end
-    self
-  end
-
-  alias_method :to_options,  :symbolize_keys
-  alias_method :to_options!, :symbolize_keys!
-end
diff --git a/activesupport/test/core_ext/hash_ext_test.rb b/activesupport/test/core_ext/hash_ext_test.rb
index f481cf0242ab57d78e2a2b6c4c7ecf3863d4a9ba..52a28c15534fe3751757c5c1f44db098fca132be 100644
--- a/activesupport/test/core_ext/hash_ext_test.rb
+++ b/activesupport/test/core_ext/hash_ext_test.rb
@@ -1,7 +1,38 @@
 require 'test/unit'
-require File.dirname(__FILE__) + '/../../lib/core_ext/hash_ext'
+require File.dirname(__FILE__) + '/../../lib/core_ext/hash'
 
 class HashExtTest < Test::Unit::TestCase
+
+  def setup
+    @strings = { 'a' => 1, 'b' => 2 }
+    @symbols = { :a  => 1, :b  => 2 }
+    @mixed   = { :a  => 1, 'b' => 2 }
+  end
+
+  def test_methods
+    h = {}
+    assert_respond_to h, :symbolize_keys
+    assert_respond_to h, :symbolize_keys!
+    assert_respond_to h, :to_options
+    assert_respond_to h, :to_options!
+  end
+
+  def test_symbolize_keys
+    assert_equal @symbols, @symbols.symbolize_keys
+    assert_equal @symbols, @strings.symbolize_keys
+    assert_equal @symbols, @mixed.symbolize_keys
+
+    assert_raises(NoMethodError) { { [] => 1 }.symbolize_keys }
+  end
+
+  def test_symbolize_keys!
+    assert_equal @symbols, @symbols.dup.symbolize_keys!
+    assert_equal @symbols, @strings.dup.symbolize_keys!
+    assert_equal @symbols, @mixed.dup.symbolize_keys!
+
+    assert_raises(NoMethodError) { { [] => 1 }.symbolize_keys! }
+  end
+
   def test_assert_valid_keys
     assert_nothing_raised do
       { :failure => "stuff", :funny => "business" }.assert_valid_keys([ :failure, :funny ])
@@ -11,4 +42,4 @@ def test_assert_valid_keys
       { :failore => "stuff", :funny => "business" }.assert_valid_keys([ :failure, :funny ])
     end
   end
-end
\ No newline at end of file
+end
diff --git a/activesupport/test/misc_test.rb b/activesupport/test/misc_test.rb
index 2a6c40709a41e5761b13d4b63c15c5bf5548559a..5a2d1d33e821afa5cd0b2799770ac757edd1d39f 100644
--- a/activesupport/test/misc_test.rb
+++ b/activesupport/test/misc_test.rb
@@ -17,35 +17,3 @@ def test_silence_warnings_verbose_invariant
     end
   end
 end
-
-class HashOptionsTest < Test::Unit::TestCase
-  def setup
-    @strings = { 'a' => 1, 'b' => 2 }
-    @symbols = { :a  => 1, :b  => 2 }
-    @mixed   = { :a  => 1, 'b' => 2 }
-  end
-
-  def test_methods
-    h = {}
-    assert_respond_to h, :symbolize_keys
-    assert_respond_to h, :symbolize_keys!
-    assert_respond_to h, :to_options
-    assert_respond_to h, :to_options!
-  end
-
-  def test_symbolize_keys
-    assert_equal @symbols, @symbols.symbolize_keys
-    assert_equal @symbols, @strings.symbolize_keys
-    assert_equal @symbols, @mixed.symbolize_keys
-
-    assert_raises(NoMethodError) { { [] => 1 }.symbolize_keys }
-  end
-
-  def test_symbolize_keys!
-    assert_equal @symbols, @symbols.dup.symbolize_keys!
-    assert_equal @symbols, @strings.dup.symbolize_keys!
-    assert_equal @symbols, @mixed.dup.symbolize_keys!
-
-    assert_raises(NoMethodError) { { [] => 1 }.symbolize_keys! }
-  end
-end