Sunday, October 10th is Powers of Ten Day!

[About the video.]

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#
Pre-algebra

## 10/10 is Powers of 10 Day

## Sept-Oct 2010 Math Calendars

## Addendum

## Rate Puzzle: How Fast Does She Read?

## Word Problems from Literature

## Math Teachers at Play #24

## Game: Target Number (or 24)

### Set Up

As I was preparing for Wednesday’s Homeschool Math Club Games & Activities meeting, I remembered my old math calendars and thought, *that would be a fun activity to offer*. So I pulled up the files and discovered that the days of the week matched perfectly. What a cool coincidence!

So in case you missed the math calendars last year, or in case it’s been long enough that your children have forgotten, here are the “new” versions:

Umm Ahmad created an easier version for young students:

*[Photo by Arwen Abendstern.]*

If a girl and a half

can read a book and a half

in a day and a half,

then how many books can one girl read in the month of June?

Kitten reads voraciously, but she decided to skip our library’s summer reading program this year. The Border’s Double-Dog Dare Program was a lot less hassle and had a better prize: a free book! Of course, it didn’t take her all summer to finish 10 books.

How fast does Kitten read?

*[Photo by Passion of Bilwa.]*

I’ve put the word problems from my elementary problem solving series into printable worksheets:

*[Photo by internets_dairy.]*

Welcome to the ** Math Teachers At Play** blog carnival — which is not just for math teachers! If you like to learn new things and play around with ideas, you are sure to find something of interest. Let’s start the mathematical fun with an arithmetic card game in honor of our 24th edition and a few number puzzles:

*[Photo by stevendepolo.]*

**Math concepts:** addition, subtraction, multiplication, division, powers and roots, factorial, mental math, multi-step thinking

**Number of players:** any number

**Equipment:** deck of math cards, pencils and scratch paper, timer (optional)

All players must agree on a Target Number for the game. Try to choose a number that has several factors, which means there will be a variety of ways to make it. Traditionally, I start my math club students with a target of 24.

Shuffle the deck, and deal four cards face down to each player. (For larger target numbers, such as 48 or 100, deal five or six cards to each player.) The players must leave the cards face down until everyone is ready. Set the remainder of the deck to one side.