Key to the North American arithmetic: part second and part third; for the use of teachers

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Tappan & Whittemore, 1853 - Arithmetic - 72 pages
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Page 68 - The first cup weighed 6 oz. If the first cup be covered, it will weigh twice as much as the second, but if the second cup be covered, it will weigh 3 times as much as the first. What is the weight of the second cup and cover ? ANALYSIS.
Page 67 - After receiving 5 times as much as he spent, he had 200 dollars. If he had received as much only as he had spent, he would have had $100; therefore the other $ 100 is 4 times as much as he spent. Ans. $25. 90. As the hare makes 4 leaps to the hound's 3, the hound makes 6 leaps to the hare's 8, and 2 leaps to the hare's...

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