Depending on your age, you’ll remember the traditional, straight forward method (algorithm) of doing a three-digit subtraction calculation, like 352 – 164, to arrive at the correct answer of 188. That ...
1. Teaching Math in 1960: 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 1970: A logger sells a truckload of lumber ...
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