1. Teaching Math

In 1950s

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 1960s

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 1970s

A logger sells a truckload of lumber for $100. His cost

of production is $80. Did he make a profit?

4. Teaching Math

In 1980s

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 1990s

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.)

6. Teaching Math

In 2009

Un hachero vende una carretada de maderapara $100. El

costo de la producciones es $80. Cuanto dinero ha hecho?