The definition of a fraction is that if A and B represent two algebraic expressions and B contains letters, then the formula A/B is called a fraction. Score is one of the key contents in junior high school mathematics, and the examination of its related knowledge in senior high school entrance examination mathematics has always been a hot spot.

Conditions for the score:

1, the condition that the score is meaningful: the denominator is not 0.

2. The condition that the fractional value is 0: the numerator is 0 and the denominator is not 0.

3. The condition that the fractional value is positive (negative): the same sign of the numerator and denominator is positive, and the different sign is negative.

4. Condition of fractional value 1: numerator = denominator ≠0.

5. The condition that the fractional value is-1: both the numerator and denominator are reciprocal, and neither is 0.

Score calculation method:

The unit of the score is 1.

The decimal unit of 5/8 is 1/8.

It has five such decimal units, plus three such decimal units, which equals one.

Fractional unit refers to dividing the unit 1 into several parts and taking one part, that is, the numerator is 1, the denominator is a positive integer fraction, and the fractional unit of 5/8 is 1/8. * * contains five identical fractional units, plus three identical fractional units equals 1.