Merrill cuts 6 apple pies into halves. How many 1/2-size pie pieces does she have?

12, you would have 12 half size pie pieces because 1 pie broke in half is 2 half pie pieces therefore if you have 6 pies you cut them all in half and you have 12 half pie pieces.

She has 12 apple halves!

6x2=12 or six apples times 2 (since he was cutting them in half) is equal to twelve total halves