Math 1950 - 2007

1. Teaching Math In 1950

A logger sells a truckload of lumber for $100. His cost of
production is 4/5 of the price. What is his profit?

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2. Teaching Math In 1960

A logger sells a truckload of lumber for $100. His cost of
production is 4/5 of the price, or $80. What is his profit?
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3. Teaching Math In 1970

A logger sells a truckload of lumber for $100. His cost of
production is $80. Did he make a profit?


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4. Teaching Math In 1980
A logger sells a truckload of lumber for $100. His cost of
production is $80 and his profit is $20. Your assignment: Underline the
number 20.

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5. Teaching Math In 1990

A logger cuts down a beautiful forest because he is selfish and
inconsiderate and cares nothing for the habitat of animals or the
preservation of our woodlands. He does this so he can make a profit of $20.
What do you think of this way of making a living? Topic for class
participation after answering the question: How did the birds and squirrels
feel as the logger cut down their homes? (There are no wrong answers )

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6. Teaching Math In 2007

Un hachero vende una carretada de madera por $100. El costo de la producciones es $80. Cuanto dinero ha hecho?