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Saturday, May 14, 2011

Mixed Fractions: PIZZA TIME

Hi class,

Tomorrow is the day, the day we have PIZZA!

                                                 

I have some awesome news, and a new math problem I need help with. The pizza store made too many pizzas for our class alone to have. They made us 2 and ½ pizzas. 

To review what we learned about mixed fractions I have included a short summary.There are two ways to represent these as a fraction that include whole numbers. The first is to show them as something called a “Mixed Fraction” the second is to show them as an “Improper fraction”.  We will be working with Mixed Fractions only during this week.


Do you know what two and half pizzas look like?

       

Do you know how to represent these as a fraction?

The picture below shows 1 whole and ½ of another whole. We learned a whole is when the denominator and the numerator are the same number. For example the bottom left image is a whole which can be represented as 10/10. There are 10 parts and all 10 are colored in.   Instead of writing 10/10 we can write it as just 1. Since the other is a ½ fraction, not a whole we still write it as ½ .  We will now write the faction down as 1½, which we call a mixed fraction, because it contains a whole and a fraction beside one another.



So how many classes do you think 2 ½ pizzas can serve?

As a bit of a challenge to help prepare you for next weeks lesson on improper fractions and mixed fractions I have included the following video. Enjoy!


Using the ‘Matching Math Mixed Fractions’ game, practice your understanding of mixed fractions.  Let me know how you do, and I look forward to eating pizza with you tomorrow!