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Teaching mathematics

Teaching mathematics in 1970.

A logger sells a lorry load of timber for 1000.
His cost of production is 4/5 of the selling price.

What is his profit?

Teaching maths in 1980.

A logger sells a lorry load of timber for 1000.
His cost of production is 4/5 of the selling price, or 800.

What is his profit?

Teaching maths in 1990.

A logger sells a lorry load of timber for 1000.
His cost of production is 800.

Did he make a profit?

Teaching maths in 2000.

A logger sells a lorry load of timber for 1000.
His cost of production is 800 and his profit is 200.

Your assignment: Underline the number 200.

Teaching maths in 2008.

A logger cuts down a beautiful forest because he is totally 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 200.

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. If you are upset about the plight of the animals in question, counselling will be available).

 

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Copyright Roy Dickason, October 2002 and May 2013.