## Friday, July 5, 2013

### More Activities on the 100s Chart

The result should look something like this:

Those that are left uncolored are the prime numbers.  Prime numbers have exactly two factors, one and itself.  Composite numbers have more than two factors.  One is neither prime or composite.

Once students have completed this chart, they can use it to develop strategies for the Factors and Multiples Game.  I introduced the Factors and Multiples Game on my blog a couple of months ago.

Activity number two is a variation on the game.  Like the original version, the first player chooses an even number less than 50.  The second player chooses a number that is either a factor or multiple of the first player's number.  Instead of using strategies to choose a number that has no uncovered factors or multiples, the students work cooperatively to create the longest factor/multiple chain.  Teams record their chains on a class chart and see who can create the longest chain.

I hope you and your students enjoy these activities.

#### 1 comment:

1. Neato! we do a lot with the 100's grid in my class. Thanks!
Bex