1.
Teaching Math In 1950
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 1960
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 1970
A
logger sells a truckload of lumber for $100. His cost
of production is $80. Did he make a profit?
4.
Teaching Math In 1980
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 1990
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 )
6.
Teaching Math In 2007
Un
hachero vende una carretada de madera por $100.
El costo de la producciones es $80. Cuanto dinero
ha hecho?
(taken from an email sent to me several years ago; author unknown)
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