# 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

Pub. and sold by McCarty & Davis, 1831 - Arithmetic - 198 pages
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### Contents

 NUMERATION 7 Simple Multiplication 13 Federal Money 22 Simple Reduction 30 Compound Addition 42 Compound Subtraction 49 Compound Multiplication 55 Compound Reduction 66
 Insurance Commission and Brokage 199 109 Barter 115 Exchange 122 Vulgar Fractions 129 Square Root 157 Alligation 163 Arithmetical Progression 171 Compound Interest by Decimals 177

### Popular passages

Page 2 - 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 172 - Divide the difference of the extremes by the number of terms, less 1, and the quotient will be the common difference.
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 2 - Co. of the said district, have deposited in this office the title of a book, the right whereof they claim as proprietors, in the words following, to wit : " Tadeuskund, the Last King of the Lenape.
Page 37 - And every other thirty-one, Except the second month alone, Which has but twenty-eight in fine, Till leap year gives it twenty-nine.
Page 142 - 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 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.
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 190 - Feet multiplied by feet, give feet. Feet multiplied by inches, give inches. Feet multiplied by seconds, give seconds. Inches multiplied by inches, give seconds. Inches multiplied by seconds, give thirds. Seconds multiplied by seconds, give fourths.
Page 129 - The number above the line is called the numerator, and that below the line the denominator. The denominator...