# Introduction to The National Arithmetic: On the Inductive System : Combining the Analytic and Synthetic Methods in which the Principles of the Science are Fully Explained and Illustrated : Designed for Common Schools and Academies

Robert S. Davis & Company, 1857 - 324 σελίδες

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### Περιεχόμενα

 Addition op Compound Numrers 110 Miscellaneous Exercises in Addi 119 Division of Compound Numrers 125 Fractions Common Fractions 140 Decimal Fractions 181 Percentage 194
 Involution 269 Arithmetical Progression 287 Geometrical Progression 294 Alligation 300 Mensuration of Surfaces 308 Mensuration of Lumrer and Timrer 318

### Δημοφιλή αποσπάσματα

Σελίδα 158 - Multiply the numerators together for a new numerator, and the denominators together for a new denominator.
Σελίδα 145 - RULE. Multiply all the numerators together for a new numerator, and all the denominators for a new denominator: then reduce the new fraction to its lowest terms.
Σελίδα 155 - Multiplication is the process of taking one number as many times as there are units in another.
Σελίδα 132 - RULE. — Divide the given number by any prime number, greater than 1, that will divide it, and the quotient, if a composite number, in the same manner; and continue dividing until a prime number is obtained for a quotient. The several divisors and the last quotient will be the prime factors required.
Σελίδα 189 - 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 285 - A sphere is a solid, bounded by one continued convex surface, every point of which is equally distant from a point within, called the centre.
Σελίδα 136 - The greatest common divisor of two or more numbers is the greatest number "that will divide each of them without a remainder. Thus 6 is the greatest common divisor of 12, 18, and 24.
Σελίδα 86 - Weight is used in mixing medicines. TABLE. 20 Grains (gr.) make 1 Scruple, sc. or B 3 Scruples " 1 Dram, dr. or 3 8 Drams
Σελίδα 231 - Boston \$1000, \$250 of which is to be paid in 4 months, \$350 in 8 months, and the remainder in 12 months ; what is the average time for the payment of the whole sum"?
Σελίδα 231 - Multiply each payment by the time before it is due, then divide the sum of the products by the sum of the payments, and the quotient will be the true time required.