# Essentials of Arithmetic, Oral and Written

American book Company, 1907 - 324 σελίδες

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Σελίδα 316 - A pile of wood 8 feet long, 4 feet wide, and 4 feet high, contains 1 cord; and a cord foot is 1 foot in length of such a pile.
Σελίδα 160 - ... thick ? To find the number of board feet in a piece of lumber, multiply the number of board feet in one foot of the length by the number of feet in the length of the piece. 5. Find the number of board feet in 16 pieces of 3
Σελίδα 85 - 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...
Σελίδα 315 - Square Measure 144 square inches = 1 square foot 9 square feet = 1 square yard 30J square yards = 1 square rod 160 square rods = 1 acre 640 acres = 1 square mile Cubic Measure 1728 cubic inches = 1 cubic foot 27 cubic feet = 1 cubic yard 128 cubic feet...
Σελίδα 247 - Which proves that the square of a number composed of tens and units contains, the square of the tens plus twice the product of the tens by the units, plus the square of the units.
Σελίδα 78 - 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.
Σελίδα 229 - Hence, the area of a trapezoid is equal to the product of its altitude by the line connecting the middle points of the sides which are not parallel.
Σελίδα 31 - Multiplication is the process of taking one number as many times as there are units in another.
Σελίδα 113 - In the fraction |, which term tells the number of equal parts into which the unit has been divided ? How many of the equal parts are expressed in the fraction ? Write a fraction expressing twice as many equal parts. 2. Draw a diagram to show what part of a mile is expressed in | mi. Show the part that represents f mi.