1. Teaching Math to the Class of 1964:
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 to the Class of 1974:
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 to the Class of 1984:
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 to the Class of 1994
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 to the Class of 2004
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 to the Class of 2006
Un hachero vende una carretada de maderapara $100. El costo de la
producciones es $80.