Teaching Math: 1960-2010
1. Teaching Math In 1960
A logger sells a truckload of lumber for $100. His cost of
production is 4/5 of the price. What is his profit?
2. Teaching Math in 1970
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?
3. Teaching Math In 1980
A logger sells a truckload of lumber for $100. His cost
of production is $80. Did he make a profit?
4. Teaching Math In 1990
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.
5. Teaching Math In 2000
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?
6. Teaching Math In 2010
Un hachero vende una carretada de maderapara $100. El
costo de la produccion es $80.