The teacher's assistant: or, A system of practical arithmetic: wherein the several rules of that useful science are illustrated by a variety of examples, a large proportion of which are in Federal money : the whole designed to abridge the labour of teachers, and to facilitate the instruction of youth

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Pub. and sold by McCarty & Davis, 1831 - Arithmetic - 198 pages
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Page 8 - An Act supplementary to an Act, entitled " An Act for the Encouragement of Learning, by securing the copies of Maps, Charts, and Books, to the authors and proprietors of such copies during the time* therein mentioned," and extending the benefits thereof to the arts of designing, engraving, and etching historical and other prints.
Page 74 - Then multiply the second and third terms together, and divide the product by the first term: the quotient will be the fourth term, or answer.
Page 112 - Discdunt is an allowance made for the payment of a sum of money before it becomes due, according to a certain rate per cent, agreed on between the parties concerned. The present worth of any...
Page 174 - Multiply the last term by the ratio, from the product subtract the first term, and divide the remainder by ratio less one for the sum of the series.
Page 140 - MULTIPLICATION OF VULGAR FRACTIONS GENERAL RULE. Reduce compound fractions to single ones, and mixed numbers to improper fractions; then multiply the numerators together for a new numerator, and the denominators for a new denominator.
Page 99 - RULE.* Multiply the principal by the 'rate per cent, and divide the product by 100: the quotient will be the interest for 1 year.
Page 162 - Bring down the first figure of the next period to the remainder for a new dividend, to which find a new divisor, and so on, till the whole be finished.
Page 157 - Subtract the square number from the left hand period, and to the remainder bring down the next period for a dividend.
Page 131 - Operations with Fractions A) To change a mixed number to an improper fraction, simply multiply the whole number by the denominator of the fraction and add the numerator.
Page 132 - RULE. Multiply all the numerators together for a new numerator, and all the denominators for a new denominator: then reduce the new fraction to its lowest terms.

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