1. Fractional multiplication and division algorithm

1, the fraction is multiplied by the integer, the denominator remains the same, the numerator is multiplied by the integer, and finally the score that can be reduced is reported.

2. The score is multiplied by the score, the numerator is multiplied by the numerator, the denominator is multiplied by the denominator, and finally the offer score that can be lowered.

Divide a fraction by an integer, and the denominator remains the same. If the numerator is a multiple of an integer, divide the numerator by the integer, and finally you can reduce the number of offer points.

Divide a fraction by an integer, and the denominator remains the same. If the numerator is not a multiple of an integer, multiply this score by the reciprocal of the integer, and finally the offer score can be reduced.

5. The score divided by the score is equal to the reciprocal of the divisor multiplied by the divisor, and finally the offer score that can be reduced.

Second, the fractional addition and subtraction algorithm

1, add and subtract fractions with the same denominator, the denominator remains the same, that is, the decimal unit remains the same, and add and subtract numerators to reduce the bid score.

2. Addition and subtraction of fractions with different denominators refers to using the basic properties of fractions to convert fractions with different denominators into fractions with the same denominator, changing the unit of fractions and keeping the size unchanged, then calculating according to the addition and subtraction of fractions with the same denominator, and finally giving the fractions that can be subtracted.