# Dubbs' Complete Mental Arithmetic: A Volume of Carefully Graded Exercises Adapted to the Use of All Schools

American Book Company, 1893 - 220 σελίδες

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### Περιεχόμενα

 Addition 1 Subtraction n Addition and Subtraction 18 Multiplication 20 Division 28 Multiplication and Division 35 Principles 42 Factoring 44 Fractions 47
 Tables 108 Questions 125 Percentage 163 Interest 190 Discount 201 Involution and Evolution 203 Miscellaneous Questions 209

### Δημοφιλή αποσπάσματα

Σελίδα 201 - The Present Worth of a debt payable at a future time without interest is such a sum as, being on interest for the time at a certain rate, will amount to the debt.
Σελίδα 207 - The square of the sum of two numbers is equal to the square of the first, plus twice the product of the first by the second, plus the square of the second.
Σελίδα 108 - TABLE. 10 Mills (m.) = 1 Cent . . ct. 10 Cents = 1 Dime . . d. 10 Dimes = 1 Dollar . \$. 10 Dollars = 1 Eagle . E.
Σελίδα 114 - Length 12 inches (in.) = 1 foot (ft.) 3 feet = 1 yard (yd.) 5| yards, or 16| feet = 1 rod (rd.) 320 rods, or 5280 feet = 1 mile (mi.) Square Measure 144 square inches (sq.
Σελίδα 109 - TABLE. 2 pints pt. make 1 quart, marked qt. 8 quarts - 1 peck, - pk. 4 pecks - 1 bushel, - bu.
Σελίδα 118 - 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 112 - LIQUID MEASURE 4 gills (gi.) = 1 pint (pt.) 2 pints — 1 quart (qt.) 4 quarts = 1 gallon (gal.) 31| gallons = 1 barrel (bbl.) 2 barrels = 1 hogshead (hhd...
Σελίδα 116 - A Square is a figure having four equal sides and four right angles.
Σελίδα 80 - Reduce the fractions to a common denominator and divide the numerator of the dividend by the numerator of the divisor.
Σελίδα 28 - Division is the process of finding how many times one number is contained in another ; or of finding one of the equal parts of a number.