Comparing Fractions at Peskys Partial Pizza Parlor

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Comparing Fractionsat Peskys Partial Pizza
Parlor

• DoDEA 5th Grade Standard
• M1a2 Identify and generate equivalent forms of
  fractions.
• GOALS The student will be able to compare
  fractions to determine which is greater. The
  student will be able to identify equivalent
  fractions and find common denominators.

Created by C. Indresano 7/11/200
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Mom has invited all of your friends over for
a Pizza Party tonight! She wants you to go
and pick up the pizza from Peskys Partial Pizza
Parlor downtown. You will need to get
several kinds Pepperoni, Sausage, Mushroom,
Cheese, Veggie, and Supreme. The only problem is
that Pesky is known for cheating his customers.
Youll have to know your fractions, if you want
to get the best deal for your money! Below are
three rules that will help you! Click on the
buttons to learn more.
After learning the rules, Go to Peskys Partial
Pizza Parlor
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• Now that you have learned these tricks, do you
  think you can beat Pesky at his own game?
• Pesky sells only parts of pizzas, not whole ones!
  He figures that if his customers dont know their
  fractions, he can make lots of money!

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For each pizza you order, Pesky will offer you
two choices. These choices both cost the same,
1.00. You have 6.00 to spend. Your job is to
decide which choice will give you the MOST pizza.
Keep track of how much pizza youre getting. If
you forget any of the rules, click on the blue
buttons to remind you! GOOD LUCK!
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Rule 1

• IF both DENOMINATORS are the same,
• look for the fraction with the LARGEST numerator,
  it is greater

3/6
4/6
numerator
The fraction with the larger numerator is greater
denominator
Click to go back to last slide viewed
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Rule 2

• IF the NUMERATORS are the same,
• look for the SMALLEST denominator, it is greater.

3/6
3/5
The fraction with the smaller denominator is
greater
numerator
denominator
Click to go back to last slide viewed
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Rule 3

• IF there are no COMMON
• numerators or denominators,
• Find a common denominator,
• then compare the fractions
• using

4/7
1/5
A common denominator of 5 and 7 is 35. 4/7 x
5/5 20/35 and 1/5 x 7/7 7/35
Another way to show this is
20/35 7/35
Rule 1
Click to go back to last slide viewed
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PepperoniDo you want
1/2 1/3
1/2 or 1/3?
1/2 1/3
1/2 9
Sausage Do you want
1/4 2/4
1/4 or 2/4?
1/4 2/4
1/4 10
Mushroom Do you want
6/8 3/4
6/8 or 3/4?
6/8 3/4
6/8 11
Cheese Do you want
4/6 3/9
4/6 or 3/9 ?
4/6 3/9
4/6 12
Veggie Do you want
4/11 4/10
4/11 or 4/10 ?
4/11 4/10
4/11 13
Supreme Do you want
1/9 3/5
1/9 or 3/5 ?
1/9 3/5
1/9 14
CORRECT!

• You beat Pesky!
• 1/2 is greater than 1/3.
• Look at the picture
• This follows

Rule 2
1/2
1/3
Click here to place your next order
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YOU GOT IT!
Too bad for Pesky! 1/4 is less than 2/4. Look at
the picture This follows

Rule 1
2/4
1/4
Click here to place your next order
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SORRY!

• Pesky got you!
• 1/2 is greater than 1/3.
• Look at the picture
• This follows

Rule 2
1/2
1/3
Click here to place your next order
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YOU MISSED IT!
Shame on Pesky! 1/4 is less than 2/4. Look at the
picture This follows

Rule 1
2/4
1/4
Click here to place your next order
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YOU GOT IT!
And since you knew they were both the same size,
you get both parts for 1.00! 6/8 is equal to
3/4. Look at the picture This follows

6/8
3/4
Rule 3
Using Rule 3 3/4 x 2/2 6/8
Click here to place your next order
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GOOD TRY but
These are equivalent fractions. 6/8 is equal to
3/4. Look at the picture This follows The good
news is that you get the same size of pizza no
matter what you picked!!

6/8
Rule 3
3/4
Find a common denominator 3/4 x 2/2
6/8
Click here to place your next order
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INCORRECT!
Pesky stumped you! 4/6 is greater than 3/9. Look
at the picture This follows

4/6
3/9
4/6 x 3/3 12/18 3/9 x 2/2 6/18
Rule 3
Click here to place your next order
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GOOD JOB!
You stomped Pesky! 4/6 is greater than 3/9. Look
at the picture This follows

Rule 3
4/6
3/9
Click here to place your next order
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WAY TO GO!
Pesky cant fool you! 4/11 is greater than
4/10. Look at the picture This follows

Rule 2
4/11
4/10
Click here to place your next order
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NO LUCK!
Pesky fooled you! 4/11 is less than 4/10. Look at
the picture This follows

Rule 2
4/11
4/10
Click here to place your next order
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YAHOO!
You really got Pesky this time! 1/9 is less than
3/5. Look at the picture This follows

Rule 3
1/9
3/5
Lets see how you did?
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OH NO!
Pesky really got you this time! 1/9 is less than
3/5. Look at the picture This follows

1/9
3/5
Rule 3
Find a common denominator 1/9 x 5/5 5/45
and 3/5 x 9/9 27/45
Lets see how you did?
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How much Pizza did you get for 6.00?

• If you beat Pesky every time you should have
  gotten
• Pepperoni 1/2
• Sausage 2/4
• Mushroom 6/8 and 3/4 (bonus!)
• Cheese 4/6
• Veggie 4/10
• Supreme 3/5
• Excellent work

Click home to play again
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Now youre ready to go home with your pizza!
Have a great time at the party!
Sorry Pesky, Youre not invited!
For more fun comparing fractions, visit these
websites http//www.visualfractions.com/Compare.ht
ml http//www.webmath.com/k8cf.html