As adults we just think "it's just that way". We have been using math to make a connection between "just because" and "oh ya". Today we were building numbers and looking at 1 less, 1 more, 10 less, and 10 more! It was great when students realized 1 less from 4 groups of 10 means we have to break a group back into ones! It was a true lightbulb moment!