# The Columbian Calculator: Being a Practical and Concise System of Decimal Arithmetic ...

Kay & Troutman, 1846 - 264 σελίδες

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### Περιεχόμενα

 Simple Numbers from 9 to 42 Tables of Weights and Measures 60 Compound Numbers 72 to 87 Proportion 101 Vulgar Fractions 114 to 135 Coins Currency c 159 Profit and Loss 172
 Gross Tare c 185 Cube Root 202 Permutation 219 Appendix 235 Miscellaneous Matter in Mensuration 249 Blackboard 263

### Δημοφιλή αποσπάσματα

Σελίδα 151 - Compute the interest on the principal to the time of the first payment, and if the payment exceed this interest, add the interest to the principal and from the sum subtract the payment: the remainder forms a new principal.
Σελίδα 190 - If the errors are alike, divide the difference of tire products by the difference of the errors, and the quotient will be the answer. 5. If the errors are unlike, divide the sum of the products by the sum of the errors, and the quotient will be the answer.
Σελίδα 32 - Find how many times the divisor is contained in the first figure, or figures, of the dividend, and, setting it directly under the dividend, carry the remainder, if any, to the next figure as so many tens.
Σελίδα 129 - 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.
Σελίδα 120 - 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.
Σελίδα 109 - A and B depart from the same, place and travel the same road ; but A goes 5 days before B, at the rate of 15 miles a day . B follows at the rate of 20 miles a . day } what distance must he travel to overtake A ? Ans. 300 miles RULE OF THREE INVERSE.
Σελίδα 216 - There are five things in arithmetical progression, any three of which being given, the other two may be found : — 1st. The first term. 2d. The last term. 3d. The number of terms. 4th. The common difference. 5th. The sum of all the terms.
Σελίδα 255 - Suppose a ladder, 60 feet long, be so planted as to reach a window 37 feet from the ground on one side of the street, and, without moving it at the foot, will reach a window 23 feet high on the other side ; what was the breadth of the street?
Σελίδα 256 - The height of a tree growing in the centre of a circular island 44 feet in diameter, is 75 feet, and a line stretched from the top of it over to the hither edge of the water, is 256 feet. What is the breadth of the stream, provided...
Σελίδα 120 - RULE. Divide the numerator by the denominator, and the quotient will be the whole or mixed number sought.