Answer:
The digits in the tens place increase by one from each number to the next.
Explanation:
When you count by tens, all the numbers end in zero. For example, if you are counting ,"ten, twenty, thirty, …," the numbers are
10
20
30
40
etc.
The digits in the tens place increase by 1 from each number to the next.
This is the same as in ordinary counting: 1, 2, 3, 4, …
That's the pattern.