## Dubbs' Complete Mental Arithmetic: A Volume of Carefully Graded Exercises Adapted to the Use of All Schools"First edition of Dubbs' work on mental arithmetic. The author states in the preface that this subject is the most important that has been taught in the schools because it develops the reasoning faculties quicker than the study of any other discipline. The work consists of a series of problems in the various subjects of primary mathematics, including the basic sections, fractions, interest, discounts and percentages, among others. These are 'carefully graded exercises adapted to the use of all schools.' All to be accomplished without pencil or paper!" -- Antiquarian bookseller's description, 2018. |

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Dubbs' Complete Mental Arithmetic: A Volume of Carefully Graded Exercises ... Eugene L Dubbs No preview available - 2016 |

### Common terms and phrases

12 rods 15 cents 50 cents 9 mo A's money acres acres of land Algebra amount Answer apiece apple trees barrels of flour Bought a number boys buggy bushels of wheat cents a bushel cents a pound certain number cider commission contained cords of wood cows cube root discount divided dividend divisor dollars earn Elementary Algebra equal farmer sold feet Find the cost fraction gain percent gallons H. A. GUERBER hogs horses eat hundredweight insured interest less LESSON loss lost marbles marked price MENTAL ARITHMETIC midnight miles an hour Multiply ounces oxen paid past noon pecks pennyweights piece pints plums principal quarts received Reduce remainder selling price shares Sold 15 Solution square root Subtract thereby losing tons of hay twice watch week weigh wheat yards of cloth

### Popular passages

Page 115 - SQUARE MEASURE 144 square inches (sq. in.) = 1 square foot (sq. ft.) 9 square feet — 1 square yard (sq. yd.) 30^ square yards = 1 square rod (sq. rd.) 160 square rods = 1 acre (A.) 640 acres = 1 square mile (sq.

Page 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.

Page 109 - TABLE. 2 pints pt. make 1 quart, marked qt. 8 quarts - 1 peck, - pk. 4 pecks - 1 bushel, - bu.

Page 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.

Page 201 - DISCOUNT. DISCOUNT is an allowance made for the payment of money before it is due. The present worth of a debt payable at...

Page 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...

Page 80 - Reduce the fractions to a common denominator and divide the numerator of the dividend by the numerator of the divisor.

Page 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.

Page 45 - A number is divisible by 3 if the sum of its digits is divisible by 3• A number is divisible by 9 if the sum of its digits is divisible by 9.