Examine the base-four examples within the activity. Which of the following are
possible correct items to notice. (Select ALL that apply)
If there is a 0 in a number, (such as 10$_4$), the 0 is not needed.
This system works just like the base 10 system, but has less digits.
Every time you have 4 toothpicks or 4 groups of toothpicks, you bundle them
and it creates a new place value in the written expression.
In base four, the only digits used are 0, 1, 2, and 3.