2. Subtraction of negative numbers: Simply put, subtracting a negative number is equivalent to adding the positive number of that number. For example: -2-(-3)=-2+3=3-2= 1. Or: -3-(-2)=-3+2=2-3=- 13.
3. Multiplication of negative numbers: Like multiplication of positive numbers, the algorithm only needs to consider the sign problem. If two numbers have the same sign, the result is positive; If the signs of two numbers are opposite, the result is negative. For example: (-2)*(-3), both numbers are negative and have the same sign, so the result is positive, that is, 6. If: (-2)*3 or 2*(-3), the signs of the two numbers are different, so the result is negative and it is -6.4.
4. Division of negative numbers: The method is the same as multiplication of negative numbers. First, divide according to the fact that both numbers are positive numbers, and then judge the symbols. If two numbers have the same sign, the result is positive; If the signs of two numbers are opposite, the result is negative. For example: (-6)/(-2), both numbers are negative and have the same sign, so the result is positive, that is, 3. If: (-6)/2 or 6/(-2), the signs of the two numbers are different, so the result is negative, that is, -3.
Extended data:
Properties of negative numbers
If all negative numbers are less than zero, then all negative numbers are less than positive numbers. Zero is neither positive nor negative. Then -a
There is neither a minimum number nor a maximum number in negative numbers.
The minus sign before a negative number is equal to the absolute value of the negative number.
Such as -2, -5.33, -45, etc. The absolute value of 2 is 2, the absolute value of -5.33 is 5.33, the absolute value of -45 is 45, and so on.
The score can also be negative, such as -2/5.
The square root of a negative number is represented by the imaginary unit "I". (Negative numbers in real numbers have no square root)
The largest negative integer is-1.
There is no smallest negative number.
Baidu encyclopedia-negative number