To determine the place value of the underlined digit in each number given, we need to identify the position of the digit and understand which place value it represents.
5 1 692
The underlined digit is '1', which is in the thousands place. Therefore, the place value of the digit '1' is 1,000.
5 6 683
The underlined digit is '6', which is in the thousands place. Thus, the place value of the digit '6' is 6,000.
7 2 584
The underlined digit is '2', which is in the thousands place. Hence, the place value of the digit '2' is 2,000.
8 6 45
The underlined digit is '6', which is in the hundreds place. This means the place value of the digit '6' is 600.
42 1 64
The underlined digit is '1', which is in the hundreds place. Therefore, the place value of the digit '1' is 100.
By understanding the position of each digit and what it represents in terms of place value (units, tens, hundreds, thousands, etc.), we can accurately determine the place value of any digit in a number.