## Friday, May 3, 2013

### Factor and Multiple Game on the 100 Chart

Today I am starting a series of posts about using 100 Charts for teaching different math concepts.  I posted Rounding on the 100 Chart about six months ago, but I didn't realize then how many levels of math I could teach with this tool.
Rules for Factors and Multiples
1. The first player chooses an even number less than 50 and marks it with initials or a marker.  Pinto beans are a good size for this game board.
2. The second player chooses a number that is either a factor or a multiple of the first number and places his/her mark on that square.
3. Players continue to take turns covering squares that are a factor or a multiple of the previous square.
4. When a player cannot find a factor or multiple of the last number played, he/she loses the game.
After introducing this game, and playing a round of teacher against the class, I thought my fourth graders were ready to play in pairs.  I could tell by the questions they were asking and how quickly they got stuck, that their ideas of factors and multiples didn't extend beyond the math facts they memorized.
I made double-sided copies of the six 100 charts on a page and showed them how to make the multiple patterns for 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, and 12.  I told them they could use the charts they created to find factors and multiples.
The third day we played the game I reviewed factor trees.  I told them this was another strategy they could use for finding factors of large numbers.
I hope you enjoy this activity with your class.
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1. looks great...just what I need to kick off the second term and get them excited ! Thanks for sharing!

2. Thank you for the compliment. My students have been enjoying this game.

3. This looks like fun! Thanks for sharing!

~Erin
Mrs. Beattie's Classroom

4. Thanks, Erin. I'm planning to laminate a set of 100 charts for this and other games.

5. This is a great idea! Thank you so much for sharing. I'm a new follower!

Hunter's Tales from Teaching

1. Welcome! I hope your students enjoy this game as much as mine do.