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Page 246 - There are usually reckoned six simple machines ; the lever, the wheel and axle, the pulley, the inclined plane, the Screw, and the wedge.
Page 158 - ... on the principal sum due on the obligation, for one year, add it to the principal, and compute the interest on the sum paid, from the time it was paid, up to the end of the year; add it to the sum paid, and deduct that sum from the principal and interest added as above.
Page 66 - To reduce a mixed number to an improper fraction. Multiply the whole number by the denominator of the fraction, and to the product add the given numerator.
Page 262 - There are five things in arithmetical progression, any three of which being given, the other two may be found : — 1st. The first term. ' 2d. The last term. 3d. The number of terms. 4th. The common difference. 5th. The sum of al!
Page 9 - NUMBERS 0 nought, zero, cipher 1 one 2 two 3 three 4 four 5 five 6 six 7 seven 8...
Page 224 - Thus 4x4=16: the number 16 is the 2nd power or square of 4. If a number be multiplied by itself, and the product arising, be again multiplied by the number, the second product is called the 3rd power, or cube of the number.
Page 157 - Compute the interest to the time of the first payment; if that be one year or more from the time the interest commenced, add it to the principal, and deduct the payment from the sum total. If there be after payments made, compute the interest on the balance due to the next payment, and then deduct the payment as above; and in like manner from one payment to another, till all the payments are absorbed; provided the time between one payment and another be one year or more.
Page 209 - The area of a triangle is equal to half the product of its base by its altitude.