The numeric keypad keys / * - + are bound to these commands by default:
Key |
Command |
/ |
Scroll Half Page Up |
* |
Scroll Half Page Down |
- |
Function Up |
+ |
Function Down |
If you want those keys to function normally by just inserting the character on the key top, then you need to unassign those keys from the commands.
Use the Options > Key Assignments dialog box to find those commands and delete the key assignments for each of them. When the key assignments are removed from those keys, they will function normally.