In 0.638405, what is the value of the digit " 3 "?

In the number 0.638405, the digit "3" is located in the tenths place. This means it represents three-tenths, or 0.3 in simple decimal form. So, in the context of this number, the "3" contributes significantly to the overall value, indicating just how important each digit can be in a decimal! When working with decimal numbers, a common mistake is misplacing the decimal point, which can completely change the value of the number. Always double-check your placements, and if you’re ever in doubt about a digit’s position, remember to visually track each place value starting from the decimal point for clarity!