A Compendium of Practical Arithmetick

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From the Press of Joseph Cooper, 1790 - 387 sider
 

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Side 213 - Multiply all the numerators together for a new numerator, and all the denominators together for a new denominator.
Side 230 - RULE. Divide as in whole numbers, and from the right hand of the quotient point off as many places for decimals as the decimal places in the dividend exceed those in the divisor.
Side 200 - Reduce the given fraction to such a compound one, as will express the value of the given fraction, by comparing it with all the denominations between it and that denomination you would reduce it to ; lastly, reduce this compound fraction to a single one, by Case V.
Side 163 - When the rates of the several ingredients, the quantity to be compounded,, and the mean rate of the whole mixture are given, to find how much of each sort will make up the quantity.
Side 174 - The sum of all the terms. Any three of which being given, the other two may be found.
Side 19 - Thirty Days hath September, April, June and November ; February hath Twenty-eight alone, And all the rest have Thirty-one ; Except in Leap Year, — then's the time February's Days are Twenty-nine.
Side 179 - Given the first term, last term, and common difference, to find the number of terms. RULE. — Divide the difference of the extremes by the common difference, and the quotient increased by 1 is the number of terms.
Side 319 - What ready money will purchase the reversion of a lease of $ 60 per annum, to continue 6 years, but not to commence till the end of 3 years, allowing 6 per cent compound interest to the purchaser? The present worth, to commence immediately, we find 20')'0'5') to be, $295'039, and -y^- =247'72. Ans. $247'72. It is plain, the same result will be obtained by finding the present worth of the annuity, to commence immediately...
Side 210 - When the lower fraction is greater than the upper, subtract the numerator of the lower fraction from the denominator, and to that difference add the upper numerator, carrying one to the unit's place of the lower whole number.
Side 131 - A merchant has owing him $ 300, to be paid as follows : $ 50 in 2 months, $ 100 in 5 months, and the rest in 8 months ; and it is agreed to make one payment of the whole : in what time ought that payment to be ? Ans.

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