5/12+blank=1/2 has to have a whole number in the blank

Jerica, are you sure that you copied this problem out correctly?  I ask because you add 1/12 to 5/12 to get 6/12 which is 1/2.  There is no way to add a whole number because then you would get something larger than 1, but the answer is only 1/2.

Wendy