The number 3.5 is already expressed in decimal form. A decimal representation uses a base-10 system, where each digit’s place value is a power of ten. In this instance, the ‘3’ is in the ones place, and the ‘5’ is in the tenths place. Therefore, 3.5 signifies three and five-tenths.
Representing numbers using the decimal system is crucial for everyday calculations, financial transactions, scientific measurements, and engineering applications. Its standardized form facilitates accurate communication and computation across various disciplines and ensures consistent interpretation of numerical values. The adoption of the decimal system has simplified mathematical operations compared to earlier, more complex number systems.