Smith's Inductive Arithmetic and Federal Calculator on a New, Interesting and Instructive Plan ...

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D. Burgess & Company, 1855
 

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Página 115 - Multiply the numerators together for a new numerator, and the denominators together for a new denominator.
Página 121 - To reduce a mixed number to an improper fraction. Multiply the whole number by the denominator of the fraction, and to the product add the given numerator.
Página 67 - TABLE. 144 Square Inches (sq. in.) make 1 Square Foot sq. ft. 9 Square Feet " 1 Square Yard sq. yd. 30} Square Yards
Página 130 - RULE. — Write the less compound number under the greater, so that units of the same denomination shall stand in the same column. Subtract as in subtraction of simple numbers. If any number in the subtrahend is larger than that above it, add to the upper number as many units as make one of the next higher denomination before subtracting, and carry one to the next lower number before subtracting it.
Página 121 - An Improper Fraction is one whose numerator is equal to or greater than its denominator ; as, f , -J.

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