Primary school mathematics (People's Education Edition) begins to learn fractions from the third grade, and the learning content is "the preliminary understanding of fractions".

The skills of primary school score operation are mainly manifested in two aspects:

1, all the calculation skills of integers and decimals can be applied to the ingenious calculation of fractions, such as the algorithm of multiplication, the extraction of common factors, letter substitution and other common methods.

2. Unique methods in fractional simplification, including fractional splitting and integral reduction.

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.