# The Normal Union Arithmetic: Designed as the Primary Part of a Shorter Course in Mental and Written Arithmetic, Μέρος 1

Sower, Potts & Company, 1878 - 152 σελίδες

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### Δημοφιλή αποσπάσματα

Σελίδα 107 - Thirty days hath September, April, June, and November ; All the rest have thirty-one, Except the second month alone, Which has but twenty-eight, in fine, Till leap year gives it twenty-nine.
Σελίδα 140 - What is 1 ninth of 1 ? of 2? of 3 ? of 4 ? of 5 ? of 6 ? of 7 ? of 8? of 9 ? of 10 ? of- 11?
Σελίδα 121 - I. Annex ciphers to the numerator, and divide by the denominator. II. Point off as many decimal places in the quotient as there are ciphers used.
Σελίδα 138 - The Greatest Common Divisor of two or more numbers is the greatest number that will exactly divide each of them.
Σελίδα 111 - Multiplying or dividing both terms of a fraction by the same number does not change the value of the fraction.
Σελίδα 124 - Divide as in whole numbers, and point off as many figures for decimals in the quotient as the number of decimal places in the dividend exceeds the number in the divisor.
Σελίδα 138 - Divide the given number by any prime number greater than 1, that is an exact divisor, and the quotient, if composite, in the same manner ; and thus continue until the quotient is prime. The divisors and the last quotient will be the prime factors required.
Σελίδα 101 - Apothecaries' Weight 20 grains (gr.) = 1 scruple (3) 3 scruples = 1 dram (3) 8 drams = 1 ounce ( 3 ) 12 ounces = 1 pound...
Σελίδα 69 - Edwin lost 9 marbles, which is 3 fourths of what he had at first; how many had he at first? 6. Ten is 2 thirds of what number? SOLUTION. — If 2 thirds of some number is 10, 1 third of that number is 1 half of 10, which is 5, and 3 thirds, or the number, arc 3 times 5, or 15.