1. Teaching Maths In 1970

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

2. Teaching Maths In 1980

A logger sells a truckload of timber for $100. His cost of production is 4/5 of the price, or $80. What is his profit?

3. Teaching Maths In 1990

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

4. Teaching Maths In 2000

A logger sells a truckload of timber for $100. His cost of production is $80 and his profit is $20.
Your assignment: Underline the number 20.

5. Teaching Maths In 2008

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 forests. 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 possums feel as the logger cut down their homes? (There are no wrong answers. )