If you want to avoid using data when you're abroad, you need to turn off data roaming on your tablet. Once done, you can only use applications that don't require an internet connection.
Step 1 of 4
Find "Cellular Data"
Tap Settings.
Step 2 of 4
Find "Cellular Data"
Tap Cellular Data.
Step 3 of 4
Turn data roaming on or off
Tap the indicator next to "Data Roaming" to turn the function on or off.