diff --git a/README.md b/README.md
index 41db181..df2d158 100644
--- a/README.md
+++ b/README.md
@@ -262,6 +262,7 @@ Keybinding         | Description
 <kbd>C-x M-m</kbd> | Start your default shell.
 <kbd>C-x C-m</kbd> | Alias for `M-x`.
 <kbd>C-h A</kbd>   | Run `apropos` (search in all Emacs symbols).
+<kbd>C-h C-m</kbd> | Display key bindings of current major mode and descriptions of every binding.
 <kbd>M-/</kbd>     | Run `hippie-expand` (a replacement for the default `dabbrev-expand`).
 <kbd>C-x C-b</kbd> | Open `ibuffer` (a replacement for the default `buffer-list`).
 <kbd>F11</kbd>     | Make the window full screen.
@@ -300,7 +301,6 @@ Keybinding         | Description
 <kbd>C-c h</kbd> | Open Helm (available if you've enabled the `prelude-helm` module).
 <kbd>C-c I</kbd> | Open user's init file.
 <kbd>C-c S</kbd> | Open shell's init file.
-<kbd>C-h C-m</kbd> | Display key bindings of current major mode and descriptions of every binding.
 <kbd>C-c . +</kbd> | Increment integer at point. Default is +1.
 <kbd>C-c . -</kbd> | Decrement integer at point. Default is -1.
 <kbd>C-c . *</kbd> | Multiply integer at point. Default is *2.
diff --git a/core/prelude-editor.el b/core/prelude-editor.el
index 3c31e31..809e7d5 100644
--- a/core/prelude-editor.el
+++ b/core/prelude-editor.el
@@ -383,16 +383,19 @@ indent yanked text (with prefix arg don't indent)."
 (global-set-key [remap kill-ring-save] 'easy-kill)
 (global-set-key [remap mark-sexp] 'easy-mark)
 
-;;
+;; operate-on-number
 (require 'operate-on-number)
 (smartrep-define-key global-map "C-c ."
   '(("+" . apply-operation-to-number-at-point)
     ("-" . apply-operation-to-number-at-point)
     ("*" . apply-operation-to-number-at-point)
     ("/" . apply-operation-to-number-at-point)
+    ("\\" . apply-operation-to-number-at-point)
     ("^" . apply-operation-to-number-at-point)
     ("<" . apply-operation-to-number-at-point)
     (">" . apply-operation-to-number-at-point)
+    ("#" . apply-operation-to-number-at-point)
+    ("%" . apply-operation-to-number-at-point)
     ("'" . operate-on-number-at-point)))
 
 (provide 'prelude-editor)