Place Value Practice: Select Numbers with Tens Digit > 7

Choose a number whose tens unit is greater than 7.

To solve this problem, we must examine the tens digit of each given number and find one whose tens digit is greater than 7.

• First choice: $883$. The tens digit is 8, which is greater than 7.
• Second choice: $978$. The tens digit is 7, which is not greater than 7.
• Third choice: $957$. The tens digit is 5, which is also not greater than 7.
• Fourth choice: $869$. The tens digit is 6, which is not greater than 7.

From this analysis, the number $\ 883$ is the only one where the tens digit (8) is greater than 7.

Therefore, the correct answer to the problem is $883$.