Junior High School Mathematics, Book 1

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Page 248 - The following is the table of time: 60 seconds (sec.) = 1 minute (min.) 60 minutes = 1 hour (hr.) 24 hours = 1 day (da.) 7 days = 1 week (wk.) 12 months (mo.) = 1 year (yr.) Thirty days has September, April, June, and November.
Page 247 - 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 247 - 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 247 - LENGTH 12 inches (in.) = 1 foot (ft.) 3 feet = lyard(yd.) 5\ yards, or 16| feet = 1 rod (rd.) 320 rods, or 5280 feet =1 mile (mi.) SQUARE MEASURE 144 square inches (sq.
Page 41 - To multiply a fraction by a fraction, multiply the numerators together for the numerator of the product, and the denominators together for the denominator of the product.
Page 184 - The first and last terms of a proportion are called the extremes ; the second and third terms are called the means. In the proportion | = ££, we see that 7 x 15 = 3 x 35.
Page 247 - LIQUID MEASURE 4 gills (gi.) = 1 pint (pt.) 2 pints — 1 quart (qt.) 4 quarts = 1 gallon (gal.) 31| gallons = 1 barrel (bbl.) 2 barrels = 1 hogshead (hhd...
Page 245 - ... the diameter, we find that the cord covers half the curved surface of the cylinder. Therefore, the surface of a sphere equals the curved surface of a cylinder of the same radius and height.
Page 17 - The solution of problems of this kind depends upon this principle: Given the product of two factors and one of the factors, the other factor may be found by dividing the product by the given factor, That is, if we know the product of 2 and 5, which is 10, we can find the factor 2 by dividing 10 by 5, and we can find the factor 5 by dividing 10 by 2.
Page 170 - The area of a triangle is equal to half the product of the base and height.

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