Evaluate Hot Pizza

One day you step into a pizza shop. A small 6-inch pizza costs 5 dollars. A large 12-inch pizza costs 15 dollars. Both pizzas appear to be the same thickness. Which one will you buy?


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Snapshot 1: buying the big pizza is more economical than buying the small pizza
Snapshot 2: buying the small pizza is more economical than buying the big pizza
Snapshot 3: buying the small pizza is almost the same as buying the big pizza
This Demonstration is similar to the question posed in "Buying Watermelons Intelligently"; it is another example of quick calculations in everyday life.
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Related Curriculum Standards

US Common Core State Standards, Mathematics