Why does decimals start with tenth place not with oneth place?

Answer 1

The oneths place and the ones place would be the same thing. In the base ten system, the places are powers of ten. Hundreds is 102, tens is 101, ones is 100, tenths is 10-1, hundredths is 10-2. There is no room for a oneths place.

Answer 2

Decimals start with the tenth place because they are a way to represent numbers that fall between whole numbers. The decimal point separates the whole number part from the fractional part, with each place value to the right of the decimal point representing a power of 10. The first place to the right of the decimal point is the tenths place because it represents one-tenth of a whole unit. This system allows for precise and flexible representation of values between whole numbers.