Is it necessary to make it the simplest to confirm whether it is a fraction or an integral? For example: a * A / 2A (fraction) Simplification: A / 2 (integral) So what is that? Do you need to simplify when judging fractions and integers?

Is it necessary to make it the simplest to confirm whether it is a fraction or an integral? For example: a * A / 2A (fraction) Simplification: A / 2 (integral) So what is that? Do you need to simplify when judging fractions and integers?

No. we can't judge whether it is an integral or a fraction, but we should look at its original features. The concept of fraction is formally stipulated: the expressions whose numerator denominator is an integral and whose denominator contains letters (refers to the unknown number) are fractions