My seven year old niece is learning how to do addition. One of the drills they are doing is given a number, what other number do you need to add up to 10. For example, if the teacher says “one”, she needs to reply “nine.”

My niece is having a little trouble, so my sister says, “You give me a number and I’ll say the answer.”

“One” “Nine”

“Three” “Seven”

“Five” “Five”

“Nine” “One”

“Mom, you sound like an app.”