Answer:

This part of the extended materials mainly examines the knowledge points of fractional multiplication and division:

Fractional multiplication and division includes fractional multiplication and fractional division. Fractional multiplication refers to the numerator of a fraction multiplied by the numerator and the denominator multiplied by the denominator. What can be subtracted must be subtracted first, and the numerator cannot be multiplied by the denominator. Fractional division is a calculation method that the dividend is multiplied by the reciprocal of the divisor to get the result. Fractional multiplication and division is calculated by multiplication and division and reciprocal. The result of fractional multiplication and division needs to be simplified.

Multiplying a number by an integer and using the product of the numerator of the fraction multiplied by the integer as the numerator can be reduced to an offer fraction. Fractions are multiplied by fractions, the product of numerator multiplication is numerator, and the product of denominator multiplication is denominator. Provide points that can be reduced. When doing the first step, we should think about whether the numerator of one number and the denominator of another number can be reduced (except 0).

Fraction divided by integer, denominator unchanged. If the molecule is a multiple of an integer, the molecule is divided by the integer, and finally, the simplest fraction is not converted into the simplest fraction. Digital division conversion element digital multiplication. One fraction divided by another fraction is equal to the reciprocal of this fraction, and an integer can be divided into false fractions with the letter 1