Cynthia Lanius

Who Wants Pizza? - Part 3

Alice, the girl in the middle, is going to give Bobby, the boy in the red shirt, her share of the pizza. Bobby told the teacher, "I get two pieces of pizza."  The teacher, Ms. Martinez, said, "If Alice doesn't want any, I'll just cut the pizza into six pieces."

  1) What fraction of the pizza would Bobby get using his plan, and 2) what fraction will he get using Ms. Martinez's plan? 3)Who gets Alice's share under Ms. Martinez's plan? 4) Whose plan gives Bobby more pizza?

Let's Explore

This red is Bobby's share if all seven children eat pizza.

             


This red is Bobby's share if he gets Alice's piece also.

             


This red is Bobby's share if Ms. Martinez cuts one less piece.

           

 
Something for You to Do

Directions: Read the stories below and answer the questions. Click on the correct answer.

1. Five children raked Mr. Jones' yard on Friday afternoon and earned $20 which they shared equally. Which of the following does not represent which fraction each received?

 
Jack Mary Anne John Mike
         
         
         
         

 
1. (a. 4/20) (b. 3/15) (c. 2/10) (d. 1/5) (e. 1/4)

 


 
2. The next week Jack said he would not take a share for his work, so the other four children shared the $20 equally. Which of the following does not represent which fraction each received?

 
Mary          
Anne          
John          
Mike          

 
2. (a. 4/16) (b. 3/12) (c. 2/8) (d. 1/5) (e. 1/4)

 


 
3. The next week, Jack said, "Mr. Jones, I am doing this as a special project for Scouts and can't take money. Would you please give my share to my sister Mary?" Which of the following does not represent the fraction Mary received?

 
Mary Mary Anne John Mike
         
         
         
         

 
3. (a. 12/30) (b. 8/20) (c. 5/10) (d. 4/10) (e. 2/5)

 


 
4. What was the most money that Mary earned in one week raking leaves?

 
4. (a. 4) (b. 5) (c. 8) (d. 10) (e. 2)

 


 
5. Which is more, 1/4 or 1/5?

 
5. (a. 1/4) (b. 1/5)

 


 
How Did You Do? Click on "Get Score" below.

 

Score =

Correct answers:

 
1) What fraction of the pizza would Bobby get using his plan?

 
             

 
2) What fraction would Bobby get using Ms. Martinez's plan?

 

 
           

 
3)Who gets Alice's share under Ms. Martinez's plan?

 

 
4) Whose plan gives Bobby more pizza?

 

 

 
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lanius@math.rice.edu