You can't make 2 numbers in facebooks.
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You can not delete your notifications.
Unless someone with a Facebook account used your email address to set up their account, no, you cannot get Facebook notifications.
If you wanna stop facebook notifications go onto settings>notifications>facebook and then turn sounds , alerts and badges all off. i work for apple California i would no Trust me
im guessing that you mean the notifications sent to your email in which case you go to account settings, notifications and it should say something like 'facebook will send you notifications when...' and un-tick all the boxes underneath. remember there is two pages of boxes
The Facebook notifications on the iPhone will disappear after one clicks on them. This is the only way to get rid of them once they are delivered. To stop receiving notifications, one can log into Facebook and change the settings in "Mobile" under the "Settings" menu.