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Unlike addition, subtraction is not commutative, so the order of numbers in the operation will change the result. Two examples: children may write a sum for each column, so they add 375 to 466 and they get 71311. Multiply the fraction: ^ x 5 = J = 1J Multiply the whole part: 20 x 5 = 100 Add the products: - 10*£ Am. 1. In English, decimal (decimus < Lat.) means tenth, decimate means reduce by a tenth, and denary (denarius < Lat.) means the unit of ten. This requires practice and the gradual learning of many short cuts.

Pages: 672

Publisher: Cengage Learning; 2 edition (November 10, 1995)

ISBN: 0395746213

Durell's Arithmetic

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