Fritz's favorite and best subject is math (takes after his ol' Mama). We're using Math U See Beta, but he's already figured out some things on his own--like multiples of twelve and how many thousands are in a million. He also loves big numbers. We check out library books designed to help kids wrap their heads around concepts like how large a pile of a billion peas would be.
Today while walking Della, he had a question for me about subtracting larger numbers from smaller ones. I had to give a brief explanation about the world of negative numbers. No matter how big a positive number he could think of there was a corresponding negative number . The whole way home he would quiz me. "What's 100-200? What's 1000-9000?" Now I'm pretty good at math myself, but he stumped me with this one-- "What's one quadrillion minus one googleplex?" I couldn't tell him, but I assured him it's a negative number.