# Mental Arithmetic: Being an Introduction to His New System of Arithmetic on an Improved Plan

J.P. Jewett and Company, 1859

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### Contenido

 Sección 1 1 Sección 2 2 Sección 3 3
 Sección 4 9 Sección 5 15 Sección 6 67

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Página 87 - M. 60 minutes, 1 hour, h. 24 hours, 1 day, d. 7 days, . 1 week, w. 4 weeks, 1 month, mo. 13 months, 1 day and 6 hours, 1 Julian year, yr. Thirty days hath September, April, June and November ; February twenty-eight alone, all the rest have thirtyone.
Página 101 - Reduce the fractions to a common denominator and divide the numerator of the dividend by the numerator of the divisor.
Página 103 - I have not a hundred; but if I had half as many more as I now have, and two geese and a half, I should have a hundred ; how many had he 1 176.
Página 89 - Mnltiple of two or more numbers is the least number that can be divided by each of them without a remainder ; thus 30 is the least common multiple of 10 and 15.
Página 86 - DRY MEASURE 2 pints (pt.) = 1 quart (qt.) 8 quarts =1 peck (pk.) 4 pecks = 1 bushel (bu...
Página 99 - To reduce a fraction to its lowest terms. A fraction is in its lowest terms, when the numerator and denominator are prime to each other.
Página 89 - The Least Common Multiple of two or more numbers is the least number which is a multiple of each of them; thus, 12 is the least common multiple of 2, 3, and 4.
Página 69 - If the numerator is less than the denominator, the fraction is called a proper fraction; if it is equal to or greater than the denominator, the -fraction is called an improper fraction.
Página 56 - ... times 3 in 12 4 times 4 in 16 4 times 2 in 10 5 times 3 in 15 5 times 4 In 20 5 times 2 in 12 6 times 3 in 18 6 times 4 in 24 6 times 2 in 14 7 times 3 in 21 7 times 4 In 28 7 times 2 in 16 8 times 3 in 24 8 times 4 In 32 8 times 2 in 18 9 times 3 in 27 9 times 4 in 36 9 times...
Página 101 - It will be seen that we multiply the denominator of the dividend by the numerator of the divisor for...