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Modern Math

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Last week I purchased a burger and fries at McDonalds for $3.58.
>>> >
>>> > The counter girl took my $4.00 and I pulled 8 cents
>>> > from my pocket and gave it to her. She stood there,
>>> > holding the nickel and 3 pennies. While looking at the
>>> > screen on her register, I sensed her discomfort and
>>> > tried to tell her to just give me two quarters, but
>>> > she hailed the manager for help. While he tried to
>>> > explain the transaction to her, she stood there and
>>> > cried.
>>> >
>>> > Why do I tell you this?
>>> >
>>> > Because of the evolution in teaching math since the
>>> > 1950s:
>>> >
>>> > 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?
>>> >
>>> > 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?
>>> >
>>> > Teaching Math In 1970
>>> >
>>> > A logger sells a truckload of lumber for $100. His
>>> > cost of production is $80. Did he make a profit?
>>> >
>>> > 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.
>>> >
>>> > 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.)
>>> >
>>> > Teaching Math In 2005
>>> >
>>> > Un ranchero vende una carretera de madera para $100.
>>> > El cuesto de la produccion era $80. Cuantos tortillas
>>> > se puede comprar?
>>
 

Jason

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Some friends of mine with businesses say the worst invention is the computerized cash register. They punch in the purchase and money tendered and the screen tells them how much change to give back.

One guy went into a convienience store, bought $5 worth of stuff, and tendered a $20 bill. The girl gave him back $50. He asked if she really wanted to do that. She got mad at him and said the till told her the change don't argue.
 

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