Question

rules of sign in multiplication and addition

Answer 1

The basic rules for multiplication and signs are as follows

(Minus ) x ( Minus ) = Plus . ( Minus ) x ( Plus ) = Minus , (Plus ) x (Plus ) = Plus .

This can be expressed as follows that (a) when we multiply two numbers with the same sign we get plus ( b) when we multiply two numbers with difference signs we get a minus .

Addition of two Numbers with the same sign The result is the sum of the numbers with the given sign ( the sign of the two numbers ) .

When we add two plus numbers we get a plus number Ex : 3+6=9.

Answer 2

Hey ✌,

In multiplication,
$( -) \times (- )= (+ )\\ ( - ) \times ( + ) = ( - ) \\ ( + ) \times ( - ) = ( - ) \\ ( + ) \times ( + ) = ( + )$
Now,
In addition,
$( + ) + ( + ) = ( + ) \\ ( - ) + ( + ) = ( - )or( + ) \\it \: would \: be \: subtracted \: but \: \\ sign \:depends \: on \: greater \: number \\ ( + ) + ( - ) = ( + )or( - ) \\ it \: would \: be \: subtracted \: but \: \\ sign \:depends \: on \: greater \: number \\ ( - ) + ( - ) = ( - ) \\ it \: would \: be \: added \: but \\ sign \: would \: negative$

hope it helps u