Roman Numerals are HARD

This week is the last week of school (WOO!) so all of the kids are in the middle of their final exams. Last night I went to my section to help my girls study for their exams. What I learned (or rather remembered) is that Roman Numerals are REALLY hard. I mean…what were these Romans trying to pull? If there’s a 4 or a 9 you need to subtract the lower number from the bigger? I mean come on. How is a 9 year old supposed to get that?? I barely get it now. Why can't you put 4 of one symbol on there?? Why couldn't they just add all the symbols together?? And why couldn’t they just use NUMBERS? Que ridiculo.