# Robinson's Progressive Practical Arithmetic: Containing the Theory of Numbers, in Connection with Concise Analytic and Synthetic Methods of Solution, and Designed as a Complete Text-book on this Science, for Common Schools and Academies

Ivison, Blakeman, Taylor & Company, 1877 - 359 уелЯдет

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### Ресйечьменб

 SIMPLE NUMBERS 8 LAWS AND RULES POR NOTATION AND PRIME NUMBERS 67 SUBTRACTION 73 MULTIPLICATION 79 DEFINITIONS 86 REDUCTION 89 ADDITION OF FRACTIONS 96 PROMISCUOUS EXAMPLES 112 REDUCTION OF DECIMALS 121
 CUBIC MEASURE 165 CIRCULAR MEASURE 198 PERCENTAGE 205 COMMISSION AND BROKERAGE 212 PARTIAL PAYMENTS 08 INDORSE 216 GOLD INVESTMENTS 225 INSURANCE 233 RATIO AND PROPORTION 279 COMPOUND PROPORTION 289

 DECIMAL CURRENCY 136 MULTIPLICATION OF DECIMAL CUR ARTICLES SOLD BY TUE 100 OR 1000 142 DEFINITIONS 150 LONG MEASURE 158
 808 345 ANALYSIS 354 РнехмбфйкЬ дйкбйюмбфб

### ДзмпцйлЮ брпурЬумбфб

УелЯдб 48 - Division is the process of finding how many times one number is contained in another.
УелЯдб 161 - SQUARE MEASURE 144 square inches (sq. in.) = 1 square foot (sq. ft.) 9 square feet = 1 square yard (sq. yd.) 30| square yards = 1 square rod (sq. rd.) 160 square rods = 1 acre (A.) 640 acres = 1 square mile (sq.
УелЯдб 73 - The Greatest Common Divisor of two or more numbers is the greatest number that will exactly divide each of them.
УелЯдб 89 - To reduce fractions to their lowest terms. A fraction is in its lowest terms when its numerator and denominator are prime to each other ; that is, when both terms have no common divisor. 1. Reduce the fraction -f§ to its lowest terms.
УелЯдб 326 - Multiply the divisor, thus augmented, by the last figure of the root, and subtract the product from the dividend, and to the remainder bring down the next period for a new dividend.
УелЯдб 52 - If any partial dividend will not contain the divisor, place a cipher in the quotient, and bring down the next figure of the dividend, and divide as before.
УелЯдб 173 - Ans. 6° 37'. 208. IN COUNTING. 12 Units or Things make 1 Dozen. 12 Dozen " 1 Gross. 12 Gross " 1 Great Gross. 20 Units " 1 Score. 209. PAPEE. 24 Sheets. '. make 1 Quire. 20 Quires " 1 Ream. 2 Reams " 1 Bundle. 5 Bundles
УелЯдб 282 - Three numbers may be in proportion when the first is to the second as the second is to the third.
УелЯдб 49 - Rule. — I. Write the divisor at the left of the dividend, with a line between them.
УелЯдб 153 - TROY WEIGHT. 24 grains (gr.) = 1 pennyweight (pwt.). 20 pennyweights = 1 ounce (oz.). 12 ounces = 1 pound (lb.). 351. Apothecaries' weight is used in mixing medicines and in selling them at retail. APOTHECARIES