First, addition

Negative number 1+ negative number 2=- (negative number 1+ negative number 2)= negative number

Negative number+positive number = the sign takes the sign of the addend with larger absolute value, and the numerical value takes the addend with larger absolute value minus the addend with smaller absolute value.

Second, subtraction.

Negative number 1- negative number 2= negative number 1+ (negative number 2)= negative number 1 plus the reciprocal of negative number 2, and then use negative number plus positive number to calculate.

Negative-positive =-(positive+negative) = negative? The subtraction of two numbers with different signs is equal to the sum of their absolute values.

Third, multiplication.

Negative number 1× negative number 2= (negative number 1× negative number 2) = positive number

Negative x positive =-(positive x negative) = negative.

Fourth, division.

Negative 1÷ negative 2= (negative 1÷ negative 2) = positive.

Negative/positive number =-(negative/positive number) = negative number

Generally speaking, dividing by the same symbol equals a positive number, and dividing by different symbols equals a negative number.

Extended data:

If all negative numbers are less than zero, then all negative numbers are less than positive numbers. Zero is neither positive nor negative. 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. Negative numbers in real numbers have no square root. The largest negative integer is-1. There is no smallest negative number.

References:

Baidu Encyclopedia _ Negative Number