The first chapter of the second volume of the sixth grade of People's Education Press introduced negative numbers, but the operation was only learned in the first chapter of rational numbers in the first grade.

Add:

Negative 1+ negative 2 =-| negative 1+ negative 2 | = negative?

Negative number+positive number = sign of addend with larger absolute value.

A numerical value is a value obtained by subtracting a smaller absolute value from a larger absolute value.

Subtraction:

Negative number 1- negative number 2 = negative number1-negative number 2 | = symbol with larger absolute value of addend.

"Division with the same name", that is, when two numbers with the same sign are subtracted, the symbol of the minuend is in front of the bracket, and the absolute value of the minuend minus the absolute value of the minuend is in the bracket. For example:

(+5)-(-3)=+(5+3)

(-5)-(-3)=-(5-3)

"Different names are beneficial to each other", that is, when two numbers with different symbols are subtracted, the symbol of the minuend is in front of brackets, and the absolute value of the minuend plus the absolute value of the minuend is in brackets. For example:

(+5)-(-3)=+(5+3)

(-5)-(+3)=-(5+3)

Extended data:

×

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

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

÷

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.

Baidu encyclopedia-negative number