How to find the answer (mathematical problem solving)

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Alan wants to buy a lathe on the installment plan, Bonnie has to measure windows to see how many yards of material are needed for draperies, and Harry must figure out how many boxes of tile he will need to cover the kitchen floor.  Pictures each as he solves his problem, and stresses the procedure--decide what data you need, obtain and organize the data, estimate the result, perform the needed operations, and check your answer. 
IUL Moving Image Archive
IUL Moving Image Archive
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