Many useful procedures explained and taught: 2-column addition, left-to-right subtraction, direct multiplication by numbers greater than 12, mental division of large numbers, more. Also numerous helpful shortcuts. More than 8,000 problems, with solutions. 1945 edition.
The Plan of This BookADDITIONAddition in General"Adding Single Columns by Pairs, starts on""Adding Single Columns by Trios, starts on""Mental Addition of Large Numbers, starts on""Two-Column Addition, starts on"SUBTRACTIONSubtraction in General"Left-to-Right Subtraction, starts on"MULTIPLICATIONMultiplication in General"Factoring, starts on""Direct Multiplication by Numbers Greater than 12, starts on""Multiplying Three Figures by One, starts on""Multiplying Two Figures by Two, starts on""Multiplying Three Figures by Two, starts on""Multiplying Three Figures by Three, starts on"DIVISIONDivision in General"Direct Division by Numbers Greater than 12, starts on""Mental Division of Large Numbers, starts on""Division by Three Figures, starts on""Division by Two Figures, starts on"FRACTIONSFractions in General"Addition and Subtractions of Fractions, starts on"DECIMALSDecimals in General"Decimal Equivalents of Fractions, starts on"SHORT CUTSHorizontal AdditionCombined Addition and SubtractionMultiplying by a Near NumberAliquot Parts in MultiplicationSimplifying the MultiplierMultiplication by FactoringFactors between 11 and 19Multiplying by 11"Multiplying by 21, 31, 41, etc.""Squares of Numbers, starts on""Multiplying When Corresponding Orders Are Alike, starts on"Multiplying a Sum by a Difference"Multiplications Involving Fractions, starts on"Aliquot Parts in DivisionCubes of NumbersAlgebraic MultiplicationTable of Prime and Composite NumbersANSWERS
