A Primary Arithmetic

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Sheldon and Company, 1880 - Arithmetic - 189 pages
 

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Page 123 - OF TIME. 60 Seconds = 1 Minute. 60 Minutes = 1 Hour. 24 Hours = 1 Day. 7 Days = 1 Week. 28 Days = 1 Lunar Month.
Page 163 - The Greatest Common Divisor of two or more numbers is the greatest number that will exactly divide each of them. Thu4, 18 is the greatest, common divisor of 36 and 54, since it is the greatest number that will divide each of them without a remainder.
Page 72 - There are 7 days in one week. How many days are there in 4 weeks ? 5.
Page 135 - Addition is the process of finding the sum of two or more numbers.

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