Kristy, doing math?

During dinner the other night we started quizing Kristy on sight words. After we had done them numerous times each she took it to math. She wrote down 2+2= and waited for my answer. She stated that I was right and put a check next to the = to say that it was right. We then turned it on her. After a few questions we decided to throw her a curve, add three numbers. And as you can see she did it. We did not o the math for her she counted on her fingers and came up with correct answers!