When modeling negative thirteen plus positive twelve using red chips for negative integers and black chips for positive integers, how many and what color chips remain for the solution?

1 black chip

1 red chip

twenty-five black chips

twenty-five red chips

Question

When modeling negative thirteen plus positive twelve using red chips for negative integers and black chips for positive integers, how many and what color chips remain for the solution? 

 1 black chip 

 1 red chip 

 twenty-five black chips 

 twenty-five red chips

anonymous · Answer

As -13+12=-1, so one red chip remains.