The American Common-school Arithmetic: In which the Principles of the Science are Fully Explained and Applied to the Solution of a Great Variety of Practical Examples : Designed for the Use of Common Schools and Academies

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Tappan, Whittemore & Mason, 1850 - 264 σελίδες
 

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Σελίδα 67 - 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.
Σελίδα 3 - Los números cardinales 0: zero 1: one 2: two 3: three 4: four 5: five 6: six 7: seven 8: eight 9: nine 10: ten 11: eleven 12: twelve 13: thirteen 14: fourteen 15: fifteen 16: sixteen 17: seventeen 18: eighteen 19: nineteen 20: twenty...
Σελίδα 85 - If the numerator and denominator of each fraction is multiplied (or divided) by the same number, the value of the fraction will not change.
Σελίδα 81 - The least common multiple of two or more numbers, is the least number that can be divided by each of them without a remainder.
Σελίδα 87 - 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.
Σελίδα 198 - Multiply £ the sum of the extremes by the number of terms, and the product will be the answer 10.
Σελίδα 232 - These are usually accounted six in number, viz. the Lever, the Wheel and Axle, the Pulley, the Inclined Plane, the Wedge, and the Screw.
Σελίδα 170 - If 248 men, in 5 days, of 11 hours each, can dig a trench 230 yards long, 3 wide, and 2 deep, in how many days, of 9 hours each, will 24 men dig a trench 420 yards long, 5 wide, and 3 deep ? Here the number of days, in which the proposed work can be done, depends on five circumstances, viz.
Σελίδα 23 - Hence it follows, we must always point off in the product as many places for decimals as there are decimal places in both factors. 2. Multiply '75 by '25. OPERATION. In this example, we have 4 de'75 cimal places in both factors ; we '25 must therefore point off 4 places for decimals in the product.
Σελίδα 193 - RULE. 1 . Separate the given number into periods of three figures each, by putting a point over the unit figure and every third figure bejond the place of units.

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