# The Federal Calculator; Or, Scholar's Assistant : Containing the Most Concise and Accurate Rules for Performing the Operations in Common Arithmetic; Together with Numerous Examples Under Each of the Rules, Varied So as to Make Them Conform to Almost Every Kind of Business

J.Grigg, 1830 - 180 σελίδες

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### Περιεχόμενα

 Numeration 9 Multiplication 15 Subtraction 21 Division e 32 Compound Multiplication e 45 Compound Subtraction 54 Compound Division 60 Proportion or the Single Rule of Three 72
 Tare and Tret 91 Compound Interest 98 Insurance Commission and Brokag 105 Loss and Gain 112 Exchange 118 Vulgar Fractions 124 Multiplication of Vulgar Fractions 131 Subtraction of Decimals 137

### Δημοφιλή αποσπάσματα

Σελίδα 2 - IDE, of the said District, hath deposited in this office, the title of a book, the right whereof he claims as proprietor, in the words following, to wit : " Inductive Grammar, designed for beginners. By an Instructer." In conformity to the act of the Congress of the United States...
Σελίδα 126 - Now .} of f- is a compound fraction, whose value is found by multiplying the numerators together for a new numerator, and the denominators for a new denominator.
Σελίδα 2 - 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.
Σελίδα 73 - ... multiply the second and third terms together, and divide the product by the first for the answer, which will always be of the same denomination as ftie third term.
Σελίδα 157 - Multiply the sum of the two extremes by the number of terms, and half the product will be the sum of all the terms.
Σελίδα 20 - When the multiplier is a composite number, (or exactly equal to the product of any two figures in the multiplication table ; — RULE. — Multiply first by one of those figures, and that product by the other, the last product will be the answer.
Σελίδα 143 - If the errors are alike, divide the difference of the products by the difference of the errors, and the quotient will be the answer.
Σελίδα 168 - CASE 1. The annuity, and rate given, to find the present worth. RULE. Divide the annuity by the ratio less one, for the present worth. Note. — For perpetual half yearly, or quarterly payments, Table V.
Σελίδα 146 - A man was hired 50 days on these conditions. — that, for every day he worked, he should receive \$ '75, and, for every day he was idle, he should forfeit \$ '25 ; at the expiration of the time, he received \$ 27'50 ; how many days did he work...
Σελίδα 125 - To reduce an improper fraction to a whole or mixed number, — RULE : Divide the numerator by the denominator ; the quotient will be the whole or mixed number.