A Practical and Theoretical System of Arithmetic: Containing a New System of Proportion : with Theoretical Explanations of All the Principal Rules

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C. Morse, 1838 - 192 頁
 

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第 164 頁 - Divide the difference of the extremes by the common difference, and the quotient increased by 1 is the number of terns. EXAMPLES. 1. If the extremes be 3 and 45, and the common difference 2 ; what is the number of terms 1 Ans.
第 62 頁 - Multiplying or dividing both terms of a fraction by the same number does not change its value.
第 164 頁 - PROBLEM II. The first term, the last term, and the number of terms given, to find the common difference. RULE. — Divide the difference of the extremes by the number of terms less 1 , and the quotient will be the common diffcrenct.
第 105 頁 - If 8 men can build a wall 20 feet long, 6 feet high and 4 feet thick, in 12 days ; in what time...
第 174 頁 - To find the area of a trapezoid. RULE. Multiply half the sum of the two parallel sides by the perpendicular distance between them : the product will be the area.
第 51 頁 - When the numerator is less than the denominator, the value of the fraction is less than 1.
第 55 頁 - ... thing remains, multiply it by the next inferior denomination, and divide by the denominator as before, and so on as far as necessary, and the quotient will be the answer.
第 124 頁 - The rule for casting interest, when partial payments have been made, is to apply the payment, in the first place, to the discharge of the interest then due. If the payment exceeds the interest, the surplus goes towards discharging the principal, and the subsequent interest is to be computed on the balance of principal remaining due.
第 53 頁 - 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.
第 102 頁 - The fourth term is found by multiplying the second and third terms together and dividing by the first § 14O.

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