Basic knowledge and concept of mathematics: fraction
What is a score?
Divide the whole "1" into several parts on average, and the number representing such a part or parts is called a fraction. Denominator refers to the average division of an object into several parts, and numerator refers to the number of these parts. Divide 1 into denominator parts to represent such molecular parts.
The numerator is above the denominator, which can also be regarded as division. The numerator is divided by the denominator, and the opposite multiplication can also be expressed as a fraction.
The difference between percentage and score
(1) has different meanings, and the percentage only indicates the ratio of two numbers, and it cannot be accompanied by the company name; The score can represent a specific number or the relationship between two numbers, and the specific number can be represented by the company name.
(2) Percentages can be integers or decimals; The numerator of a fraction cannot be a decimal, but only a natural number other than 0; Percentages cannot be reduced, but fractions are generally divided into the simplest fractions by reduction.
(3) Any percentage can be written as a fraction with a denominator of 100, and fractions with a denominator of 100 do not all have the meaning of percentage.
(4) The application range is different. Percentages are often used for investigation, statistics, analysis and comparison in production and life, while fractions are often used when the results in calculation and measurement are less than integers.
nature
1 → numerator → fractional line 2→ denominator pronunciation: half written: 1/2
The horizontal line in the middle of the score is called fractional line, the number above the fractional line is called numerator, and the number below the fractional line is called denominator. Read it as a score.
Fractions can be expressed by the division formula: for example, half equals 1 divided by 2. Where 1 numerator is equal to dividend,-fractional line is equal to divisor, denominator of 2 is equal to divisor, and 0.5 fractional value is equal to quotient.
Scores can also be expressed as ratios, for example; Half is equal to 1 ratio 2, where 1 numerator is equal to the previous paragraph, a fractional line is equal to the comparison number, the denominator of 2 is equal to the latter item, and the value of 0.5 points is equal to the ratio. The basic nature of a fraction: the numerator and denominator of a fraction are multiplied or divided by the same non-zero number, and the obtained fraction is equal to the original fraction. A/b=a×k/b×k=a÷n/b÷n(b, k and n are not equal to zero).
Scores can be divided into: true scores, false scores, fractions and percentages.
Or divided into positive and negative scores. However, in mathematics, only true points and false points are generally recognized.