Question

formulas of integers​

Answer 1

Step-by-step explanation:

addition / substraction

1. + + = + ( do addition and give bigger no. sing )
2. - + = ( do substraction and give bigger no. sing )
3. - - = - ( do addition and give bigger no. sing )

multiplication / division

1. + + = +
2. - + = -
3. - - = -