sign table , basic sign rule in addition,subtraction,multiplication,division of negative numbers

how to multiply two negative numbers //how to divide two negative numbers//
how to add two negative numbers//
how to subtract two negative numbers
how to multiply //add//subtract//divide one negative and one positive number
sign rule during addition//
sign rule during subtraction
sign rule during multiplication
sign covention maths basics for class 6th onwatds

tablebasicaddition,subtraction,multiplication,division