# Cobb's Explanatory Arithmetick, Number Two: Containing the Compound Rules and All that is Necessary of Every Other Rule in Arithmetic for Practical Purposes ... to which is Annexed a Practical System of Book-keeping

J. Kay & Brother, 1835 - 216 СЕКъДЕР

### тИ КщМЕ ОИ ВЯчСТЕР -сЩМТАНГ ЙЯИТИЙчР

дЕМ ЕМТОПъСАЛЕ ЙЯИТИЙщР СТИР СУМчХЕИР ТОПОХЕСъЕР.

### пЕЯИЕВЭЛЕМА

 Compound Arithmetick 9 Compound Addition 17 Compound Substraction 48 Compound Multiplication 73 Compound Division 92 Vulgar Fractions 110 Addition of Vulgar Fractions 121 121 Numeration of Decimals 128
 Division of Decimals 134 Reduction of Moneys Weights Measures c 140 Reduction of Currencies 147 Practice 159 Simple luterest 163 Tare and Tret 168 Involution 175

### дГЛОЖИКч АПОСПэСЛАТА

сЕКъДА 160 - Compute the interest to the time of the first payment ; if that be one year or more from the time the interest commenced, add it to the principal, and deduct the payment from the sum total. If there, be after payments made, compute the interest on the balance due to the next payment, and then deduct the payment as above; and, in like manner, from one payment to another, till all the payments are absorbed ; provided the time between one payment and another be one year or more.
сЕКъДА 160 - The rule for casting interest, when partial payments have been made, is to apply the payment, in the first place, to the discharge of the interest then due. " If the payment exceeds the interest, the surplus goes towards discharging the principal, and the subsequent interest is to be computed on the balance of principal remaining due.
сЕКъДА 154 - ... 3d. If there be parts of a year, as months and days, work for the months by the aliquot parts of a year...
сЕКъДА 13 - LIQUID MEASURE 4 gills (gi.) = 1 pint (pt.) 2 pints = 1 quart (qt...
сЕКъДА 212 - Separate the given number into periods of three figures each, by putting a point over the unit figure, and every third figure beyond the place of units. 2. Find the greatest cube in the left hand period, and put its root in the quotient. 3.
сЕКъДА 117 - 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. This product becomes the numerator of the result and the denominator remains the same, eg, 2 (5x3) + 2 15 + 2 17 3" 3 3 " 3 To change an improper fraction to a mixed number, simply divide the numerator by the denominator.
сЕКъДА 132 - Multiply as in whole numbers, and point off as many figures for decimals, in the product, as there are decimals in the multiplicand and multiplier. If there be not so many figures in the product as there are decimal places in the multiplicand and multiplier, supply the deficiency by prefixing ciphers.
сЕКъДА 168 - Multiply the second and third terms together, and divide their product by the first term; and the quotient will be the answer...
сЕКъДА 174 - Multiply the first and second terms together, and divide the product by the third ; the quotient will be the answer in the same denomination as the middle term was reduced into.
сЕКъДА 11 - Scale: 4 farthings (far.) = 1 penny (d.); 12 pence = 1 shilling (s.) ; 20 shillings — 1 pound (ё). 156.