Key to the Southworth-Stone Arithmetics

Εξώφυλλο
B.H. Sanborn & Company, 1906
 

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Δημοφιλή αποσπάσματα

Σελίδα 316 - To find — The Number of Board Feet in a Piece of Lumber. Multiply the product of its length and width in feet by its thickness in inches. (Disregard thickness when it is one inch or less.) 8.
Σελίδα 319 - Multiply the complete divisor by the last root figure, subtract the product from the dividend, and to the remainder annex a new group.
Σελίδα 313 - Divide the greater number by the less and the preceding divisor by the last remainder till nothing remains. The last divisor is the...
Σελίδα 318 - ... interest due at the time. Subtract such payment or sum of payments from the amount, and with the remainder as a new principal, proceed as before to the time of settlement. Compound Interest.
Σελίδα 317 - ... thickness in inches. (Disregard thickness when it is one inch or less.) PERCENTAGE To find a — Per Cent of a Number. Multiply by the rate expressed as a decimal or as a common fraction. Rate Per Cent. Express the relation as a common fraction. Change to a decimal. Express the quotient as a per cent. INTEREST General Method. Find the product of the principal, rate per cent, and time in years. ( The time may be taken in months or in days, provided the product is divided by 12 or 360, as the case...
Σελίδα 319 - Root. I. Beginning at the decimal point, separate the given number into groups of two figures each. II. Find the greatest square in the left group and place its root at the right ; subtract the square of this root from the left group, and to the remainder annex the next group for a dividend. III. Divide this dividend, omitting the last figure, by double the root already found, and annex the quotient to the root, and also to the divisor.
Σελίδα 315 - Multiply the circumference by 0.31831, oí- divide by 3.1416. An Hypotenuse of a Right Triangle. Take the square root of the sum of the squares of the short sides of the triangle. One of the Short Sides of a Right Triangle. Take the square root of the difference of the squares of the given sides. 6.
Σελίδα 316 - The Lateral Surface of a Pyramid or Cone. Multiply the perimeter of the base by half the slant height.
Σελίδα 319 - For a partial divisor, double the root already found, considered as tens, and divide the dividend by it. The quotient (or the quotient diminished) will be the next figure of the root.
Σελίδα 318 - To find the Amount due on a Note on which Partial Payments have been made. United States rule : Find the amount of the principal to the time when a payment or the sum of several payments shall equal or exceed the, interest due at the time.

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