1. The problem is to understand the number 22.0681 where the digit 6 is underlined. 2. When a digit is underlined in a decimal number, it usually indicates the place value of that digit. 3. In the number 22.0681, the digits after the decimal point represent tenths, hundredths, thousandths, and ten-thousandths respectively. 4. The digit 0 is in the tenths place, 6 is in the hundredths place, 8 is in the thousandths place, and 1 is in the ten-thousandths place. 5. Since the 6 is underlined, it means we are focusing on the hundredths place. 6. The value of the underlined digit 6 is $6 \times 0.01 = 0.06$. 7. This means the 6 contributes 0.06 to the total number 22.0681. 8. Understanding place value helps in rounding, comparing, and performing arithmetic with decimals.