# Ray's Modern Practical Arithmetic: A Revised Edition of Ray's Practical Arithmetic

American Book Company, 1903 - Arithmetic - 320 pages
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### Contents

 The Arabic System of Notation 9 The Roman System of Notation 19 SUBTRACTION 30 MULTIPLICATION 39 Contractions in Division 64 Averages 71 COMPOUND DENOMINATE NUMBERS 75 FACTORING 120
 Fractional Compound Denominate Numbers 159 DECIMAL FRACTIONS 165 METRIC SYSTEM 179 ReductionWeights and Measures 184 PRACTICAL MEASUREMENTS 190 Trade Discount 209 111 247 Domestic Exchange 252

 Reduction 137 Addition 144 Division 153
 RATIO AND PROPORTION 266 INVOLUTION 280 Copyright

### Popular passages

Page 268 - Multiply the divisor, thus increased, by the last figure of the root; subtract the product from the dividend, and to the remainder bring down the next period for a new dividend. 5. Double the whole root already found for a new divisor, and continue the operation as before, until all the periods are brought down.
Page 270 - The square described on the hypotenuse of a rightangled triangle is equal to the sum of the squares described on the sides containing the right angle. Prop. 30. — If the square on one side of a triangle is equal to the sum of the squares on the other two sides, the angle contained by these two sides is a right angle.
Page 279 - 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.
Page 170 - To multiply a decimal by 10, 100, 1000, &c., remove the decimal point as many places to the right as there are ciphers in the multiplier ; and if there be not places enough in the number, annex ciphers.
Page 258 - Three quantities are in proportion when the first has the same ratio to the second, that the second has to the third ; and then the middle term is said to be a mean proportional between the other two.
Page 133 - To reduce a fraction to its lowest terms. A Fraction is in its lowest terms when the numerator and denominator are prime to each other.
Page 113 - Two numbers are PRIME TO EACH OTHER when they have no common factor.
Page 286 - A sphere is a solid bounded by a curved surface, every point of which is equally distant from a point within called the center.
Page 271 - A room is 20 ft. long, 16 ft. wide, and 12 ft high. What is the distance from one of the lower corners to the opposite upper corner?
Page 227 - If the payment be less than the interest, the surplus of interest must not be taken to augment the principal; but interest continues on the former principal until the period when the payments, taken together, exceed the interest due, and then the surplus is to be applied towards discharging the principal; and interest is to be Computed on the balance, as aforesaid.