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Excursion #4: Can you use the digits from 0 through 9 - using any of the four operations, addition, subtraction, multiplication and division - so that when you do the math you get 100? Each number can be used only once, but you can use them in any order that you like. Who says waiting in line has to be boring? ~~~~~~~~~~~~~~~~~~~~~~~~~~~ Answer to Excursion 3: If one greeting card measures about 1/16th of an inch, you could fit 16 in one inch. In one foot, you would have 12 X 16, or 192. There are 5280 feet in one mile, so in one mile you would have a bit over one million cards: 1,013,760. So, 200,000,000 cards, the amount mailed on the Monday two weeks before Christmas, would be about 200 miles ( or 197.285 miles.) How far is 200 miles? Ask your parents what is about 200 miles from your house. That's a LOT of cards. |
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Great Math
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