# The Teachers' Assistant, Or, A System of Practical Arithmetic: Wherein the Several Rules of that Useful Science are Illustrated by a Variety of Examples : a Large Proportion of which are in Federal Money ...

Thomas Davis, 1845 - 198 σελίδες

### Τι λένε οι χρήστες -Σύνταξη κριτικής

Δεν εντοπίσαμε κριτικές στις συνήθεις τοποθεσίες.

### Περιεχόμενα

 Numeration 7 Simple Multiplication 13 Federal Money 22 Simple Reduction 30 Compound Addition 42 Compound Subtraction 49 Compound Multiplication 55 Compound Reduction 66
 Tare and Tret 95 Insurance Commission and Brokage 109 Barter 115 Exchange 122 Vulgar Fractions 130 Decimal Fractions 144 Powers 162 Position 168

 The Single Rule of Three 72 The Double Rule of Three 80
 Geometrical Progression 174 Annuities in Reversion 185

### Δημοφιλή αποσπάσματα

Σελίδα 111 - From the last amount, subtract the given principal, and the remainder will be the compound interest. EXAMPLES.
Σελίδα 37 - And every other thirty-one, Except the second month alone, Which has but twenty-eight in fine, Till leap year gives it twenty-nine.
Σελίδα 83 - M 420 1200 4. If 10 bushels of oats be sufficient for 18 horses 20 days, how many bushels will serve 60 horses 36 days, at that rate ?
Σελίδα 129 - A vulgar fraction is a part, or parts of a unit or integer expressed by two numbers, placed one above the other, with a line drawn between them; as -i one fourth, f two thirds.
Σελίδα 131 - Operations with Fractions A) To change a mixed number to an improper fraction, simply multiply the whole number by the denominator of the fraction and add the numerator.
Σελίδα 22 - FRACTIONS, or broken numbers, are expressions for any assignable parts of an unit ; and are represented by two numbers, placed one above the other, with a line drawn between them. The number above the line is called the numerator, and that below the line the denominator.
Σελίδα 33 - Troy Weight. 24 grains (gr.) - 1 pennyweight (dwt.) 20 pennyweights — 1 ounce (oz.) 12 ounces — 1 pound (1b.).
Σελίδα 165 - CASE 2. \ . When the prices of several simples are given, to find how much of each, at their respective rates, must be taken to make a compound or mixture at any proposed price.
Σελίδα 157 - Subtract the square number from the left hand period, and to the remainder bring down the next period for a dividend. III. Double the root already found for a divisor ; seek how many times the divisor is contained...
Σελίδα 78 - If a staff 4 feet long cast a shade (on level ground) 7 feet long, what is the height of a steeple whose shade at the same time is 198 feet? Ans.