Fractional multiplication of integers, like integer multiplication, is a simple operation to find the sum of several identical addends. Multiplying a number by a fraction can be regarded as finding a fraction of this number.

The significance of fractional multiplication:

1, fractional multiplication by integer and integer multiplication have the same meaning, that is, the operation of finding several identical addends.

2. Multiplying a number with a fraction is to find the fraction of a number.

Fractional operation:

(1) The numerator is multiplied by an integer, and the product is the numerator with the same denominator.

(2) The calculation result should be simplified to the simplest score.

Calculation method:

(1) Molecule is multiplied by Molecule, and the product is regarded as Molecule. The denominator is multiplied by the denominator, and the product is used as the denominator.

(2) The calculation result should be simplified to the simplest score.

For simplicity, if the calculation process can be simplified, it can be simplified first and then calculated. (writing format: cross out the divisible numbers of the numerator and denominator, and write the divisible numbers above and below respectively. )