A misprint
Call 100 to be 100.000 then place it underneath the other number so the decimal points are in a vertical line, and then add, not forgetting the decimal point in the answer, in the same vertical line.
A decimal fraction.
when we place point in a number we call it decimal
It is a decimal representation of a rational number.
It is a non-terminating decimal number.
There is no place where there is a call!
The Dewey Decimal call number for an almanac is typically 317.5.
A number without a decimal would be a number without a fraction - hence it would be a "whole number".
A terminating decimal number.
A real number. Or, the decimal representation of a real number.
That could be a fraction, a decimal, or a mixed number.
a tenth