# Unitary Arithmetic: Embodying the First Book of Arithmetic of the Irish National Board with a Full Exposition of the Unitary System Or Method of Working Arithmetic Without Rules, with Numerous Additional Examples, and Selections from Examination Papers Set at the College of Preceptors, the London University, the Civil Service, and Oxford and Cambridge Local Examinations

Longmans, Green & Company, 1882

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### Contents

 ARITHMETICAL TABLES 5 Notation 12 Simple Multiplication 19 Compound Addition 25 104 52
 Vulgar Fractions 67 Bills of Parcels 75 Commission Brokerage Insur Mental Arithmetic 95 Decimals 132

### Popular passages

Page 92 - To reduce a mixed number to an improper fraction, — RULE : Multiply the whole number by the denominator of the fraction, to the product add the numerator, and write the result over the denominator.
Page 60 - DISCOUNT. DISCOUNT is an allowance made for the payment of money before it is due. The present worth of a debt payable at some future...
Page 96 - RULE. Multiply all the numerators together for a new numerator, and all the denominators for a new denominator: then reduce the new fraction to its lowest terms.
Page 92 - Rule. — Divide the numerator by the denominator, the quotient will be the whole number...
Page 79 - RULE. Reduce the fraction to its lowest terms, then extract the square root of the numerator for a new numerator, and the square root of the denominator for a new denominator. If...
Page 9 - 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. mi.) Cubic Measure 1728 cubic inches (cu.