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### Περιεχόμενα

 THE ARABIC SYSTEM of NoTATION 9 THE ROMAN SYSTEM of NoTATION 20 SUBTRAction 31 MULTIPLICATION 39 43 1 IVISION 54 CoM Pou ND NUMBERs 72 FACTORING 118 FRACTIONs 181 131
 Profit and Loss 210 Stock Values 216 DISCOUNT 247 Exchange 260 TAxEs 269 RATIO 276 PROPORTION 282 INVOLUTION 298

 PRACTICE 165 THE METRIC SYSTEM 189 PERCENTAGE 197 Formulas for the four cases of Percentage 203
 MENSURATION 316 PROGRESSIONS 331 Πνευματικά δικαιώματα

### Δημοφιλή αποσπάσματα

Σελίδα 304 - The square described on the hypotenuse of a rightangled triangle is equal to the sum of the squares described on the sides containing the right angle. Prop. 30. — If the square on one side of a triangle is equal to the sum of the squares on the other two sides, the angle contained by these two sides is a right angle.
Σελίδα 238 - If the payment be less than the interest, the surplus of interest must not be taken to augment the principal ; but interest continues on the former principal until the period when the payments, taken together, exceed the interest due...
Σελίδα 302 - Multiply the divisor, thus increased, by the last figure of the root; subtract the product from the dividend, and to the remainder bring down the next period for a new dividend. 5. Double the whole root already found for a new divisor, and continue the operation as before, until all the periods are brought down.
Σελίδα 310 - ... and to the remainder bring down the next period for a dividend. 3. Place the double of the root already found, on the left hand of the dividend for a divisor. 4. Seek how often the divisor is contained...
Σελίδα 85 - fur. 8 furlongs, or 320 rods " 1 mile, " m. 3 miles " 1 league,
Σελίδα 63 - III. — 1. Cut off the ciphers at the right of the divisor, and as many figures from the right of the dividend. 2. Divide the remaining figures in the dividend by the remaining figures in the divisor. 3. Annex the figures cut off to the remainder, which gives the true remainder.
Σελίδα 91 - CUBIC MEASURE 1728 cubic inches (cu. in.) = 1 cubic foot (cu. ft.) 27 cubic feet = 1 cubic yard (cu. yd.) 128 cubic feet = 1 cord (cd...
Σελίδα 178 - To multiply a decimal by 10, 100, 1000, &c., remove the decimal point as many places to the right as there are ciphers in the multiplier ; and if there be not places enough in the number, annex ciphers.
Σελίδα 186 - 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.
Σελίδα 279 - Three quantities are in proportion when the first has the same ratio to the second, that the second has to the third ; and then the middle term is said to be a mean proportional between the other two.