Subject: Math Theorums
I thought I'd turn to those who will get it. I'm getting blank stares in real life...
The other day, DS and I were talking about the odds of winning the lottery. He asked how to calculate it, so we broke it down to smaller numbers (1-9 with 1 digit number, then 1-9 with double digit number, etc.). He immediately noted the trend. With 3 digit numbers, he gave his estimate. It was not the right answer, but very, very close. He instinctively knew you had to eliminate all the single digit and double digit numbers as you wanted a triple digit number.
The immediate thought after that was he needed to see how equations were derived. The theorum and the proof to "prove" how to calculate the lottery odds. I haven't done that since high school and can't seem to locate the problem so he can work out what happens when n=1,10, 100, then n. I don't want to give him the formula and then work it out. I want him to come to his formula on his own.
Help????
ETA - forgot to say his primary math curriculum is EPGY. Just finished 3rd grade and taking a short break for the summer.
I'm not sure what it is you're trying to prove or calculate here. But I just wanted to say that "theorum" makes me think of "Yo-ho-ho, and a bottle of rum!"
