# Number

Counting, skip counting, fractions, negative numbers, and more.

A tale of two conversations

## A tale of two conversations

What was, what might have been, and what could be....all in a conversation about marshmallows.

Ten hundred Doras

## Ten hundred Doras

There was a while when Tabitha (five and six years old at the time) would try to get away without wearing underpants when she dressed herself. Those days are pretty much over, but I still like to make sure she has done the complete job, so I ask her from time to...

Math in the alphabet

## Math in the alphabet

How is the alphabet like or unlike the counting sequence, and what comes after the letter Z?

Pistachios

## Pistachios

My father buys things in bulk. Not the bulk bin, dispense-a-little-bit-into-a-plastic-bag bulk. Costco bulk. Sam's Club bulk. The children and I spent some time with my father and stepmother (who are wonderful, loving people) at the Wisconsin Dells recently. We...

Dots!

## Dots!

The New York Times published an article about Common Core homework this week. As is going to be the case with a news article (in contrast to say, a post on a blog dedicated to children's mathematical ideas), one can't really learn any mathematics from the...

Hints at Holiday

## Hints at Holiday

I told an abbreviated version of the following story on my math-teacher blog, where I used it to drive home a point to my colleagues. This version is for parents. --- My wife had been out of town for several days. I was tired of doing all the cooking and dishes. It...

Counting grapes

## Counting grapes

The "obvious" becomes complicated after a thoughtful pause.

Tens again

## Tens again

Slowing down at the end of a long, active spring day. Stormy clouds are rolling in. Tabitha and I watch them together for a couple of minutes from the west-facing window at the top of our stairs. I ask Tabitha if I can ask her a quick math question. She consents....