The digits after the decimal point represent tenths, hundredths, and thousandths respectively.

In 31.754:
• (a) The digit 5 is in the hundredths place, so its value is 5 hundredths = 0.05.
• (b) The digit in the tenths place (first decimal place) is 7.
• (c) The digit 4 is in the thousandths place, so its value is 4 thousandths = 0.004.

Final Answer: (a) 0.05, (b) 7, (c) 0.004