# Arithmetic

Addition, subtraction, multiplication, and division.
Eggs

## Eggs

Eggs are inexpensive and come packaged in math.

Counting avocados, halves, and grapefruits

## Counting avocados, halves, and grapefruits

In which we determine how many grapefruits and avocados there are, and observe the brilliance of young children.

Time Zones

## Time Zones

When children hit adolescence, the conversations need to be more about them and their interests. Here's what that looks like.

Cold snap

## Cold snap

Below zero temperatures lead to comparisons of positive and negative numbers, and the solution to 4 – (-1).

Ceiling fan arithmetic

## Ceiling fan arithmetic

What math can you find in a ceiling fan's 3-way settings?

Making eight

## Making eight

How do you know the ways of making eight?

Cookies under constraints

## Cookies under constraints

A propos of nothing one day, I ask Griffin (9 years old at the time, finishing up fourth grade) a question. Me: Griff, imagine you are baking cookies and you need $latex \frac{3}{4}$ cup of sugar, but you only have a $latex \frac{1}{2}$ cup measure. How would...

The equal sign

## The equal sign

It has been a long, busy semester for me in my community college work. Many interesting and productive projects, lots of interesting and challenging teaching problems. But I am tired. Wiped out and exhausted. So I devised a plan the other evening when Tabitha...