How to add back uninstall and disable apps

If the apps are still installed but disabled you should be able to reenable them without a hassle. First find the "Apps" menu in your phone's settings menu. From there the rightmost tab should be labeled "Disabled". If it doesn't exist you may not have any disabled apps. Clicking on any of the apps in this list will bring up a menu to enable them.

To reinstall any uninstalled apps I would use the Google Play Store. If you don't have that I would check to see if it is disabled first. If you are still unable to find the Google Play Store app you may have to reinstall it manually.

To install the Google Play Store app manually first go to your phone's settings and find the menu labeled "Security". From here scroll down until you see a toggle titled "Unknown Sources". Switch the toggle on and a message will come up warning you that apps installed from unknown sources may be dangerous. Click "OK" to continue enabling this setting.

From here you will need to download the APK file for the Google Play Store. You can find this in many places but I would suggest going to http://www.apkmirror.com/apk/google-inc/... to download it. From here select the latest released version. Released versions will simply have a release number in the name while unreleased versions will have a release number followed by A or B (e.g. 6.0.7 is a released version while 6.3.16.B-all [0] 2697688 is an unreleased version).

Once you have downloaded the APK file on your tablet simply click on it in the notifications menu or in your Downloads folder to install it. Once the Google Play Store is installed go back into your settings and turn off the "Unknown Sources" toggle. From here you should be able to use the Google Play Store to search for any of your previous apps and reinstall them.