Do you remember the names for each place in a number, up to the thousands?
Another word that we can use to describe the ones place is 'units'.
Let's see how we can count by $10$10's, using a $100$100 grid.
Complete the pattern by adding $10$10 each time.
$20$20, $\editable{}$, $40$40, $\editable{}$, $\editable{}$
Now it's time to count by $100$100's.
Complete the pattern by adding $100$100 each time.
$4$4, $104$104, $\editable{}$, $\editable{}$, $\editable{}$, $504$504