Asimov Isaac. Quick and easy math

Houghton Mifflin, 1964. — 190 p.Describes shortcuts to use in solving problems in addition, subtraction, multiplication, division, decimals, and fractionsWhy Shortcuts?
Addition
Naming the Parts of Addition
Carrying
Adding Left to Right
Round Numbers
Checking Addition
Subtraction
Addition in Reverse
Checking Subtraction
Multiplication
The Multiplication Table
Beyond the Multiplication Table
Making the Multiplier a Sum
Doubling
Checking Multiplication
Division
The Perils of Division
Divisibility by 2, 5, and 10
Divisibility by 4 and 8
Divisibility by 3, 6, and 9
Other Divisibilities
The Division Table
Rewriting Divisions
Long Division
Checking Division
Decimals
Zeros in Reserve
Freeing the Decimal Point
Manipulating Decimals
Simplifying by Decimal
Dollars and Cents
Percentage
Checking the Decimal Point
The Uses of Approximation
Fractions
Manipulating Fractions
Fractions and Decimals
Multiplication of Fractions
Fractions and Percentage
Changing Fractions into Whole Numbers
Index