### тИ КщМЕ ОИ ВЯчСТЕР -сЩМТАНГ ЙЯИТИЙчР

дЕМ ЕМТОПъСАЛЕ ЙЯИТИЙщР СТИР СУМчХЕИР ТОПОХЕСъЕР.

### пЕЯИЕВЭЛЕМА

 Notation and Numera 8 Addition 16 Subtraction 26 Multiplication 36 Division 49 Cancellation 65 Common Fractions 77 Decimal Currency 125
 Percentage 189 Interest 213 Discount 229 Exchange 248 General Analysis 255 Ratio 271 Partnership 286 Progression 311

 Metric System 137 Compound Numbers 149 Reduction 161
 Mensuration 319 Test Questions 335 Appendix 359

### дГЛОЖИКч АПОСПэСЛАТА

сЕКъДА 137 - Weight is used by apothecaries and physicians in compounding dry medicines. TABLE. 20 Grains (gr.} = 1 Scruple, . . sc., or 3. 3 Scruples = 1 Dram, . . dr., or 3 . 8 Drams = 1 Ounce, . . oz., or ╖ . 12 Ounces = 1 Pound, . . Ib., or ft,.
сЕКъДА 210 - Subtract the given principal from the last amount, and the remainder will be the compound interest.
сЕКъДА 140 - TABLE. 4 farthings (far. or qr.) make 1 penny, d. 12 pence " 1 .shilling, s. 20 shillings " 1 pound or sovereign, ё or sov.
сЕКъДА 109 - 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.
сЕКъДА 221 - Multiply each payment by its term of credit, and divide the sum of the products by the sum of the payments ; the quotient will be the average term of credit.
сЕКъДА 64 - The greatest common divisor of two or more numbers is the greatest number that will divide each of them without a remainder. Thus 6 is the greatest common divisor of 12, 18, and 24.
сЕКъДА 141 - NUMBERS. 12 units = 1 dozen. 12 dozen — 1 gross. 12 gross = 1 great gross. 20 units = 1 score.
сЕКъДА 69 - RULE. Multiply the whole number by the denominator of the fraction; to the product add the numerator, and place the sum over the given denominator. EXAMPLES. 1. Reduce 4j to its equivalent improper fraction.
сЕКъДА 315 - A Circle is a plane figure bounded by a curved line every point of which is equally distant from a point within called the center.
сЕКъДА 298 - That is, the first term of an increasing arithmetical progression is equal to the last term, minus the product of the common difference by the number of terms less one.