April 10, 2014
TJR Common Core Math Lesson
The problem: Make a 10 in order to solve for 13 minus 7.
Here's my take: 13 - 7, change the 13 to 10 then subtract 3 and then pull a 4 out of your ass and subtract that. Show your hidden partners on your fingers to an adult. Miraculously, that will result in 13! Then you just have to subtract 3 again, which results in the original 10, and then subtract 4 to get your answer -- 6.
You didn't think it would be as simple as subtracting 7 from 13, did you? Ridiculous!