Base three numbers and expanded form I need help understanding this. Write each of the following base three numerals in expanded notation.


$22_3$
$212_3$
$12110_3$
Surely this means to expand them into base ten ...

So 22 in base three is actually 8 in base ten (this is 2 + (2*3)).
212 in base three is actually 14 in base ten (this is 2 + 1*3 + 2*9).
12110 in base three is actually 147 in base ten.
If you are being asked to write numbers in the expanded notation for Base $3$ such as $112201_3$ (just a random number I made up) then you would need to write it like so (starting from the $3^5$th place, the 5th place of the digit) 

$$112201_3 = 1.3^5 + 1.3^4 + 2.3^3 + 2.3^2+ 0.3^1 + 1.3^0$$

Use this video to help yourself understand 
https://www.youtube.com/watch?v=vOyiHMa-mtQ