Question

please tell me integers formula in the label of class 7​

Answer 1

Answer:

(-)+(-)=+(-)

(+)+(+)=+(+)

(-)+(+)=-(and sign will of bigger number)

Answer 2

Answer:

$+ \: \: \: - \: = - \\ - \: \: \: - = + \\ - \: \: \: + = -$

these are the integer formula