Samsung 10.1 - Manual (Page 43)

Entering Text 36
Entering Symbols and Numbers
To enter common symbols, touch to switch to symbol mode,
then touch the corresponding key.
To enter less-common symbols, touch ➔ , then touch
the corresponding key.
Enter numbers by touching , then touching the number keys.
Using Android Voice Input
Enter text by speaking. Android Keyboard recognizes your speech
and enters text for you.
ᮣ Touch the Voice Input Key.