A Practical Introduction to Arithmetic: Or, The Teacher of Arithmetic's Assistant: Containing, Arithmetic of Whole Numbers, with Vulgar, Decimal, and Duodecimal Fractions. To which is Added, an Appendix of Directions and Examples for Receipts, Promissory Notes, Bills of Exchange, Bills of Parcels, Bills of Book-debts, and Letters; with Various Exercises on the Same

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G. Herdsfield, 1789 - Arithmetic - 100 pages
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Page 50 - To reduce a mixed number to an improper fraction. Multiply the whole number by the denominator of the fraction, and to the product add the given numerator.
Page 49 - Multiply each numerator into all the denominators except its own for a new numerator, and all the denominators together for a common denominator.
Page 58 - ... 1 from 5 to 15 ; 2 from 15 to 25 ; 3 from 25 to 35, &c.
Page 67 - 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 48 - ... can do a piece of work in 28 days. How many men could do it in 84 days?
Page 49 - J,T, }g, &c. 2. An IMPROPER FRACTION is when the numerator is equal to, or greater than the denominator, as f, f, $%, 'f 7, &c.
Page 54 - ... the numerator of the divifor into the denominator of the dividend, for a new denominator.
Page 76 - In an orchard of fruit trees, -'- of them bear apples, J. pears, plums, 60 of them peaches, and 40 cherries, how many trees does the orchard contain? Ans.

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