Me: so what's that look like with A Z: A+1 is 3 Me: so if we put it all together 2+3 became A+A+1 Z: THATS A DOUBLE AND ONE Me: what pattern are you seeing with that? Z There's 2 As and then you add 1. Me: uh huh. So we can use that pattern to add any next door neighbor numbers. Z: like 12 and 13

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Me: Yep. How would you do 12+13? Z: 12 doubled is 24. and then add 1 and its 25. [does algorithm to check 12+13] Z: I WANNA DO BIG NUMBERS NOW Me: okay, like what? Z: 1500 +1501 [long pause] Z: 3001! It's like magic. Me: so that's why we use letters. To see patterns for later. Z: cool.

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