Whether it is a fraction or a percentage, when looking for the unit "1", we only look at the front of the abstract fraction percentage, that is, the fraction percentage has no unit, for example, four fifths of a meter has a unit, and four fifths is abstract.
1, a book, read two thirds. Let's analyze it first. Two thirds of what we read is two thirds of this book, and we regard this book as "1". In this example, the score is preceded by "de" and the unit "1" is a book, that is, the unit "1" is preceded by the word "de".
Boys are two thirds of girls. It still depends on the score. There is a "yes", that is, the girl before "yes" is "1". Let's take another look. The word "yes" is in front of the girl, while the word "yes" is behind the girl, that is, the unit after "yes" is "1".
Boys are one third less than girls. Looking for a unit depends on the previous scores, that is, less than girls. Here, girls are regarded as a whole, that is, unit one. The word "Bi" is in front of the girl. So the one after "than" is unit one.
4. When looking for the unit "1", whether it is a fraction or a percentage, we only look at the front of the abstract fraction percentage, that is, the fraction percentage has no unit, it is four fifths of a meter, there is a unit, and four fifths is abstract. For example, I read three-fifths of a book.
The number of TV sets is five eighths of the number of tape recorders. It still depends on whether there is a "yes" before the score, that is, the recorder before the "yes" is "1". Let's take another look. The word in front of the tape recorder is "Yes" and the word behind the tape recorder is "Yes", that is, the unit after "Yes" is "1".
Find unit one, look at the abstract score first, and then find the key words. Formula: the unit after "Yes", "Proportion", "Occupation" and "Equivalent" is one; In front of "De" is a unit. The application problem of fractional multiplication and division is the key and difficult content in the sixth grade of primary school. As long as you master the judgment method of the unit "1", you can distinguish the question types and then master the problem-solving skills.