There are always mistakes in fraction calculation, the biggest reason is that we have not mastered the solution of the least common multiple and the greatest common factor.
The four operations of fractions are nothing more than addition, subtraction, multiplication and division. As long as you master the total score and MINUS score, the probability of making mistakes will be greatly reduced.
Calculation Basis ① Relationship between Fraction and Division
② Classification of scores
According to the relationship between numerator and denominator, fractions can be divided into true fractions and false fractions. There is also a special music score called with score.
The key point is to learn the mutual transformation between false scores and scores.
(3) the basic meaning of score → lower score and general score.
The numerator and denominator of a fraction are multiplied or divided by the same number (not 0), and the size of the fraction remains the same. This is the theoretical basis of reduction and general division. It is also the basis of fractional addition and subtraction.
When calculating the addition and subtraction of fractions and decimals, the fractional-decimal mixed operation is to convert fractions and decimals into decimals or fractions, and then calculate them according to the calculation method of decimals or decimals.
If a fraction can be converted into a finite decimal, then it can be converted into a decimal or a decimal. If a fraction cannot be converted into a finite decimal, it needs to be converted into a fraction.
Fraction addition and subtraction operation must first master the calculation method of fraction addition and subtraction operation:
The calculation of the same denominator score is relatively simple, while the calculation of the different denominator score is relatively difficult, so it is necessary to divide the score first.
Fractional multiplication
True and false fractional multiplication: child multiplication, mother multiplication.
Please note that the result is about the simplest score.
You can subtract points, subtract points first and then multiply them.
Multiply with the score, first turn the score into a false score.
Fractional classification
According to the relationship between numerator and denominator, fractions can be divided into true fractions and false fractions. There is also a special music score called with score.
The key point is to learn the mutual transformation between false scores and scores.