Subtraction of Negative Numbers: Simply put, subtracting a negative number is equivalent to adding a positive number of that number. For example, -2-(-3)=-2+3=3-2= 1. Or: -3-(-2) =-3+2 = 2-3 =-65438+.
Multiplication of negative numbers: Arithmetic, like multiplication of positive numbers, 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 with the same sign, so the result is positive, that is, 6 if: (-2)*3 or 2 *(3), two.
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 two numbers have the opposite sign, the result is negative. For example, (-6)/(-2), both numbers are negative numbers with the same sign, so the result is positive, that is, 3 if: (-6)/2 or 6/.