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:
1. Split the following 10 cards to people in your group
2. Select a scorekeeper.
3. 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)
5. 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…
1. Split the following 10 cards to people in your group
2. Select a scorekeeper.
3. 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.)
5. The person making a mistake then begins the next round by saying his card and then
another card.
3% Increase 30% Increase
(1.03)x
(1.3)x
5.3% Increase
(1.053)x
5.3% Decrease
7% Tax
(1.07)x
7% Discount
(.93)x
(.947)x
3% Decrease
(.97)x
30% decrease
(.7)x
15% Tip
(1.15)x
15% Discount
(.85)x