Last night 7 came up to me and said "30,240" is a very special number. It's a counting by 1 number. A counting by two number. A counting by 3 number....." And went all the way to 10. Before looking closely at the number, I asked "did you just multiple all the numbers together?"
"No. I didn't do 3 because 3 goes into 9. I didn't do 2 because...."
This morning I looked closer. He multipled 6,7,8,9,10.
He is so close to the concept of the lowest common denominator. I will have to give myself a reminder on how to find them efficiently. As he plays with numbers and stumbles upon concepts I feel like I have to show him the accepted conventions before he creates his own and doesn't understand symbols and methods that are internationally accepted.
I try so hard to encourage activities other than math but this is always what it falls back on when he's unsupervised.
Even with my engineering degrees, I find it hard to keep up. He's only 7.