1. Teacher Instructions
Split the class into group of about 4-5 people each.
Each group is given 10 cards that are split up evenly to all members.
Each member places the card up so that everyone can see it.
(or you can just project the cards on the screen)
Follow the student directions:
Split the following 10 cards to people in your group
Select a scorekeeper.
One person goes first and says his card, and then says another card. That person then
says his card and then someone else’s card. Play continues until someone makes
a mistake by not responding quickly enough, or not saying another card.
4. The person making a mistake gets a point. (Lowest points win)
The person making a mistake then begins the next round by saying his card and then another card.
An example: First person: 5% decrease (.97)x, 15% discount (.85)x 
Second person: 15% discount (.85)x, 7% tax (1.07)x 
Third person: 7% tax (1.07)x, ummmmmmm
So 3rd person makes a mistake and gets a point. The third person then begins the round.
After about 5 minutes, the teacher can change the cards on the screen by giving new values and then perhaps giving the second part. (IE: Just write: ‘20% tip’) The teacher can either give the winning members a small treat or make the “losers” sing a song etc…

2. 3% Increase (1.03)x 30% Increase (1.3)x 3% Decrease (.97)x
Split the following 10 cards to people in your group
Select a scorekeeper.
One person goes first and says his card, and then says another card. That person then
says his card and then someone elses card. Play continues until someone makes
a mistake by not responding quickly enough, or not saying another card.
4. The person making a mistake gets a point. (Lowest points wins.)
The person making a mistake then begins the next round by saying his card and then another card.
3% Increase
(1.03)x
30% Increase
(1.3)x
3% Decrease
(.97)x
30% decrease
(.7)x
5.3% Increase
(1.053)x
5.3% Decrease
(.947)x
15% Tip
(1.15)x
15% Discount
(.85)x
7% Tax
(1.07)x
7% Discount
(.93)x