What is a terminal decimal in math?

Answer 1

A decimal that does NOT recur to infinity.

e.g.

3.2424 is a terminal decimal

3.242424.... is a recurring to infinity decinal. Note the use of three or more stops after the last (right hand) digit.

e.g. Terminal decimals

3.1

3.12

4.156.

0.1234

et seq.,

Answer 2

A terminal decimal - is one with a finite solution. For example, 1/8 as a decimal is 0.125

The value of Pi as a decimal could never be a terminal decimal, as the solution goes on indefinitely.