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 Printable Version
for your convenience!
Gelin Rice
Topic: Arithmetic: Subtraction
Grade Level: 4th - 5th
Name of Activity: Area Code Math
Materials Needed:
Telephone Book
U.S. Map with area codes on it
Description of Activity:
The phone book's listing of area codes provides a novel source
of three digit subtraction, addition, and multiplication practice
as well as promotes map - reading skills and knowledge of U.S.
geography.
Prepare a map of the United States with the area codes on it.
Use the telephone book's area - code map as a model. Also prepare
a set of math problems based on the area codes such as:
Western Nebraska minus Missouri equals?
Eastern North Carolina plus Colorado equals?
Northern Minnesota times Arizona equals?
Students will use their maps to find the numbers indicated by
state and area names and will perform the operations specified
More sophisticated word problems can be based on area code information
such as:
If Mark in Cincinnati wants to talk to Rachel ion Chicago, what
state's area code
must he add to his own to get the right area code for Chicago?
What city s area code multiplied by 2 will give you the area code
for
Independence, MO?
Reference: Great Ideas: From Learning Volume One Math.
PA: Springhouse Corporation. p. 21. Idea by: Carol Lauritzen,
Kansas City, MO.
(1986). Springhouse
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