Liu Hui first gave the definitions of positive numbers and negative numbers. He said: "Today, the gains and losses are the opposite, so it is necessary.
Make a positive and negative name. "It means that in the process of calculation, it has the opposite meaning.
Quantity, we should use positive and negative numbers to distinguish them.
Liu Hui gave the method of distinguishing positive and negative numbers for the first time. He said, "It's counting.
Red, female is black; Otherwise, "evil" is to hit it out with a red stick.
Numbers represent positive numbers, and numbers with black sticks represent negative numbers; You can also use an oblique pendulum.
The stick is negative and the stick is positive.
Nine Chapters Arithmetic is a famous mathematical monograph in ancient China.
Ji), the first to put forward the addition and subtraction of positive and negative numbers: "Positive and negative numbers say: the same name."
In addition, different names are beneficial to each other, regular is not responsible, and negative is not correct; Its synonyms are separated by the same name.
Mutual benefit, positive but not positive, negative and not negative. "The' name' here is' number', and' except' is
It is subtraction, mutual benefit and division are the absolute values of addition, subtraction and nothing.
Is "zero".
In the present words: "the addition and subtraction of positive and negative numbers is: two numbers with the same sign are in phase."
Subtraction equals the subtraction of their absolute values, and the subtraction of two numbers with different signs equals the addition of their absolute values.
Zero minus a positive number is a negative number, and zero minus a positive number. The sum of two numbers with different signs is equal to their absolute values.
The subtraction and addition of two numbers with the same sign are equal to the addition of their absolute values. Zero plus a positive number equals positive.
Number, zero plus negative number equals negative number. "
This statement about the positive and negative number algorithm is completely correct, which is different from the current statement.
The rules are the same! The introduction of negative numbers is one of the outstanding contributions of mathematicians in China.
The habit of using numbers of different colors to represent positive and negative numbers has been preserved until now.
At present, red is generally used to represent negative numbers, and newspapers publish a country's economic deficit, table
Ming expenditure is greater than income, financial losses.
Negative numbers are antonyms of positive numbers. In real life, we often use positive numbers.
Negative numbers are used to represent two quantities with opposite meanings. The temperature in Wuhan is as high as 42℃ in summer. What do you think?
Thinking of Wuhan is really like a stove. In winter, the temperature in Harbin is MINUS 32℃, which makes you feel sad.
The cold of winter in the north.