I believe that mathematics should be taught, not collaboratively explored; algebra and geometry are better than a vague course of Integrated Math; spiraling doesn't work nearly as well as learning it properly the first time; "I don't DO math" should be an incentive rather than an excuse. "I don't DO English" should be treated the same way.
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Sunday, September 26, 2010
Cattle Puzzle
Farmer Jones sold a pair of cows for $210. On one he made 10 percent and on the other he lost 10 per cent, cleaning up just 5 per cent. What did the cows originally cost him?
Note: The answer in the book lists the two prices.
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