1960s: A logger sells a truckload of lumber for $100. His cost of production is 4/5 of the price. What is his profit?
1970s: 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?
1980s: A logger sells a truckload of lumber for $100. His cost of production is $80. Did he make a profit? Yes or No
1990s: 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.
2000s: 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 and, if you feel like
crying, it's ok).
2010: Un hachero vende una carretada de maderapara $100. El costo de la producciones es
$80. Cuanto dinero ha hecho?
ANSWER: His profit was $375,000 because his logging business is just a front for his pot
farm. (*Addendum: This joke circulated before states legalized marijuana.)
And I can see the change firsthand. When I tell my kids that the proper way to divide a fraction is to multiply by the reciprocal they look at me bewildered. To them, it's keep, change, flip. I guess it won't be long before we'll communicate via texting codes. gtgmd (got to go make dinner)