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THE

UNITED STATES CALCULATOR;

OR, ARITHMETIC SIMPLIFIED,

IN DOLLARS AND CENTS,

ADAPTED TO THE COMMERCE OF THE UNITED STATES,

IN ITS

FOREIGN AND DOMESTIC RELATIONS,

ABBREVIATED, SIMPLIFIED, AND ARRANGED ON A NEW SYSTEM,

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Entered according to Act of Congress, in the year 1840, by JOHN M’NEVIN, in the Clerk's Office, of the District Court of Maryland.

QHOI
M.686

1.1?

Page.

Page,

LECTURE I.

Multiplication of Fractions....149

Numeration......

.12 Subtraction of Fractions. .151

Preliminary Remarks. .13 Division of Fractions... ..153

LECTURE II.

Ratio of mixed Numbers..... ..154

Addition...

.18 Rule of Three in Fractions....155

LECTURE III.

Inverse Proportion by Fractions 156

Multiplication..

34

LECTURE IX.

Mental Operations..

37 Direct Proportion...

.157

Calculation of Bills..

.46 Contracted Operations. .161

LECTURE IV.

Inverse Proportion..

162

Subtraction.....

.54 Compound Proportion.. 163

LECTURE V.

Practical Arithmetic.

164

Division

.61 How to Mark Goods..

168

Properties of Numbers. .79 Custom House Calculations. .170

Analysis of Numbers.......... .84 Tare and Tret...

173

LECTURE VI.

Interest.

.176

Decimals....

90 Method of Calculation in Bank-

Addition of Decimals..........

.93

ing Institutions...

..178

Multiplication of Decimals. ..94 Partial Payments on Bills at

Subtraction of Decimals.. .96 interest..

..183

Division of Decimals.... .97 Miscellaneous Questions... ..186

Reduction of Decimals.

.99 Insurance

.188

LECTURE VII.

Marine Insurance..

.188

Reduction of Weights, Mea Insurance on Real Estate......188

sures, &c.....

.104 Merchandise, &c..

.189

Addition of Compound Numbers.129 Commission

..190

Multiplication. .do......do....132 Discount

.191

Subtraction of..do.o....do....134 Buying and Selling Stocks. ..192

Division of....do......do....136 Barter

.193

LECTURÉ VIII.

Loss and Gain....

195

Fractions Simplified..... .138 Exercise Questions.i.

...199

Preparatory Questions........140 Company Accounts.

..200

Decimal Fractions.

..143 Apportioning the effects of a

Ratio of Fractional parts of a $.143 Bankrupt.....

.201

Useful Theorems in Fractions. .144 Equation of Payments .........203

Addition of Fractions...... 147 General Averages..

...205

Reduction of mixed or Com How to Average personal ac-

pound Fractions

.148

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