A system of practical arithmetic

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Σελίδα 19 - RULE.* 1. Place the numbers so that those of the same denomination may stand directly under each other.
Σελίδα 107 - ... multiply the square of the diameter by ,7854 and the product will be- the area.
Σελίδα 104 - From half the sum of the three sides subtract each side severally; multiply the half sum and the three remainders continually together, and the square root of the last product will be the area.* * DEMONSTRATION.
Σελίδα 108 - Or, from 8 times the chord of half the arc, subtract the chord of the whole arc, and $ of the remainder will be the length of the arc, nearly.
Σελίδα 95 - ... subtract the product from the dividend, and to the remainder annex the next period for the next dividend.
Σελίδα 88 - If the errors are alike, divide the difference of the products by the difference of the errors, and the quotient will be the answer.
Σελίδα 101 - RULE. Divide the greater extreme by the less, and the cube root of the quotient, multiplied by the less extreme, gives the less mean ; multiply the said cube root by the less mean, and the product will be the greater mean proportional.
Σελίδα 51 - To reduce an improper fraction to a whole or mixed number, Divide the numerator by the denominator. The quotient will be the whole...
Σελίδα 91 - Given the first term, number of terms, and the sum of the series, to find the last term.
Σελίδα 137 - I shall just offer a few illustrations of the CENTRE OF GRAVITY. The centre of gravity of a body is that point about which all...

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