🎶 You can’t take three from two two is less than three So you look at the four in the tens place Now that’s really four tens So you make it three tens Regroup and you change a ten to ten ones And you and ‘em up to the two and get twelve and you take away three, that’s nine!

Is that clear?

Now instead of four in the tens place you’ve got three cuz you added one That is to say, ten, to the two But you can’t take seven from three So you look in the hundreds place

From the three you then use one to make ten ones (and you know why four plus minus-one plus ten is fourteen minus one? Cuz addition is commutative, right!) So you’ve got thirteen tens and you take away seven and that leaves five!

Well, six actually but the idea is the important thing!

Now go back to the hundreds place; you’re left with two and you take away one from two and that leaves…?

Everybody get one? Not bad for the first day.

Hooray for new math New-hoo-hoo math It won’t do you a bit of good to re-view math It’s so simple so very simple That only a child can do it! 🎶