I was driving home this afternoon with my kids after a playdate at McDonald's and a trip to Target. My son is in 1st grade and likes to do math problems while riding in the car (and who am I to stop him?!). It's usually something to the tune of. . .
me: What's 5 + 7?
me: What's 7 + 5?
me: What's 12 - 7?
me: What's 12 - 5?
Good practice, right?
Then I gave him 9 + 6. There was a pause, so I assumed that he was counting 6 fingers up from 9. But then I heard him saying "19, 18, 17, 16" before he gave an answer of "15".
So I asked him how he'd gotten to that answer. I was amazed (and pretty happy) with his response.
He told me he started at 20. (Because he knew 10 + 10.) Then he counted back 5. Why? I asked. Because he knew that 9 was 1 away from 10 and 6 was 4 away from 10. That made 5.
Isn't that awesome?
Now, keep in mind that I'm a high school teacher, so I don't know how 6-year old are supposed to think through these problems. But I doubt that many go about it that way. I don't think many of my high schoolers would think through it like that!
I can't wait to see what he'll do in the coming years!
Now back to wrapping presents. I'm almost done (finally).
Merry Christmas to everyone!