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### Contents

 SIMPLE NUMBERS pp 159 1 Definitions 60 COMMON FRACTIONS pp 73101 73 Addition of Fractions 80 Division of Fractions 87 Miscellaneous Written Examples 95 COMPOUND NUMBERS pp 134159 134 Definitions 142
 Problems in Interest 191 Involution 204 Angles 241 MENSURATION pp 254268 254 MISCELLANEOUS ORAL EXAMPLES 269 332 304 Contractions in Multiplication 334 Circulating Decimals 340

### Popular passages

Page 138 - CUBIC MEASURE 1728 cubic inches (cu. in.) = 1 cubic foot (cu. ft.) 27 cubic feet = 1 cubic yard (cu. yd.) 128 cubic feet = 1 cord (cd...
Page 137 - 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.
Page 136 - LENGTH 12 inches (in.) =1 foot (ft.) 3 feet = 1 yard (yd.) 5\ yards, or 16| feet = 1 rod (rd.) 320 rods, or 5280 feet = 1 mile (mi.) SQUARE MEASURE 144 square inches (sq.
Page 66 - The GREATEST COMMON DIVISOR of two or more numbers is the greatest number that will divide each of them without remainder ; thus, 6 is the greatest common divisor of 12, 18, and 30.
Page 142 - Thirty days hath September, April, June, and November ; All the rest have thirty-one, Except the second month alone, Which has but twenty-eight, in fine, Till leap year gives it twenty-nine.
Page 121 - In the metric system, the unit of length is the meter, which is one ten-millionth of the distance from the Equator to the North Pole.
Page 261 - The square described on the hypothenuse of a rightangled triangle is equal to the sum of the squares described on the other two sides.
Page 144 - NUMBERS. 12 units = 1 dozen. 12 dozen — 1 gross. 12 gross = 1 great gross. 20 units = 1 score. PAPER. 24 sheets = 1 quire. 20 quires = 1 ream. 2 reams = 1 bundle. 5 bundles = 1 bale.
Page 79 - To reduce a mixed number to an improper fraction, — RULE : Multiply the whole number by the denominator of the fraction, to the product add the numerator, and write the result over the denominator.
Page 259 - The area of a parallelogram is equal to the product of its base and its height: A = bx h.