1958 to 2008: 50 Years of Math

**Teaching Math In 1958**A logger sells a truckload of lumber for $100.

His cost of production is 4/5 of the price.

What is his profit?

**Teaching Math In 1968**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?

**Teaching Math In 1978**A logger sells a truckload of lumber for $100.

His cost of production is $80.

Did he make a profit?

**Teaching Math In 1988**A logger sells a truckload of lumber for $100.

His cost of production is $80 & his profit is $20.

Your assignment: Underline the number 20.

**Teaching Math In 1998**A logger cuts down a beautiful forest because heis selfish & inconsiderate & cares nothing for the habitat of animals orthe preservation of our wood-lands. 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 thequestion: How did the birds & squirrels feel as thelogger cut down their homes? (There are no wronganswers, & if you feel like crying, it's okay.)

**Teaching Math In 2009**Un hachero vende una carretada de madera para $100.

El costo de las producciones es $80.

Cuanto dinero gana?

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