Question

The number that must be added to -66 to get -78 is

Answer 1

Step-by-step explanation:

= -78-(-66)

= (-)(-) = +

= - 78 + 66

= (-) (+) = -

= 78 - 66

= - 12 (sign will be of minus as 78 is greater than 66)

So, -66 + - 12 = - 78