In a multi-digit whole number, each place value is
ten times greater than the place value to its right.
So, a digit in one place represents ten times
what it represents in the place to its right.
The 9 in the tens place has a value of 90.
The 9 in the ones place has a value of 9.
So, 90 is ten times greater than 9.
This means that the 9 in the tens place is ten times greater than the 9 in the ones place.