Understanding Dozens: A Story about Eggs and Learning the Number of Eggs in a Dozen, Lecture notes of Mathematics

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A Dozen

 One Dozen= 12 of something

 Examples: 12 eggs, 12 video games, 12 headbands, 12 Wizards of Waverly Place shirts, 12 Hannah Montana CD’s.  So, from now on, if you hear people talking about using a dozen eggs, you know it means 12 of them.

 After Todd and Nolan had figured out how many eggs it took to make two dozen, they were all ready to leave. But just before they were ready to check out, Hailey called Todd on the phone. Hailey said, “Todd, Lauren and I need you to get two dozen more eggs so we can finish making that cake for Mrs. Deweese. Would you be willing to do that?” Todd of course agreed, and he and Nolan went back to get more eggs.  Question: If Todd and Nolan have two dozen eggs and that is 24 eggs, how many eggs would they have if they bought two dozen more?  Answer: 48 eggs

 After Todd and Nolan got two dozen more eggs, they were all ready to leave. They thought to themselves, we have 48 eggs here now, that will definitely be enough to get done what we need to. But, right before they got to the check out line, Nolan’s phone rang. This time it was Zeck. Zeck asked Nolan if he could get him a dozen eggs so he could make some cookies for Mr. Welcher. Nolan said that he would be happy to. Nolan told Todd and they went back to the egg aisle.  Question: If Todd and Nolan have four dozen, or 48 eggs, how many would they have if they bought another dozen for Zeck?  Answer: 60 eggs

 Todd and Nolan delivered the eggs to Hailey, Lauren

and Zeck. They were able to complete their cooking in

time for the class party on Friday, and the whole class

was able to enjoy a wonderful party with cookies and

cake!

 And this was all possible because each of them knew how many eggs it took to make a dozen!