The practice and theory of arithmetic

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Página 30 - Remove the decimal point as many places to the right as there are ciphers in the multiplier.
Página 16 - 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.
Página 180 - The sum, therefore, of all the terms of both series, is equal to the sum of the first and last terms multiplied by the number of terms...
Página 154 - When a decimal number is to be divided by 10, 100, 1000, &c., remove the decimal point as many places to the left as there are ciphers in the divisor, and if there be not figures enough in the number, prefix ciphers.
Página 159 - Four quantities are in proportion when the ratio of the first to the second is equal to the ratio of the third to the fourth.
Página 12 - A Common Multiple of two or more numbers is a multiple of each of them.
Página 39 - RULE. 1. Separate the given number into periods of two figures each, by placing a dot over units, hundreds, etc.
Página 71 - Then multiply the second and third terms together, and divide the product by the first term: the quotient will be the fourth term, or answer.
Página 7 - Then multiply the divisor by this figure and subtract the product from the figures divided; to the right of the remainder bring down the next figure of the dividend and divide this number as before.
Página 107 - RULE. Multiply each quantity by its price, and divide the sum of the products by the sum of the quantities.

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