Multiplication of Two-Digit Numbers with 11
Multiplication of Larger Numbers with 11
Above and Below the Base Method
General Multiplication Using the Vertically and Crosswise Method
Two-Digit by Two-Digit Multiplication
Three-Digit by Three-Digit Multiplication
Rapid Left-to-Right Columnar Addition
Addition with Numbers Near 10 or a Multiple of 10
Subtraction with Numbers Near 10 or a Multiple of 10
Subtraction with the All from 9 and Last from 10 Method
Subtracting from a Power of 10
Subtracting a Number Ending in Zero from a Power of 10
Subtracting When Neither Number is a Power of 10
Starting the Method Later in the Problem
Ending the Method Earlier in the Problem
Type 1: Fractions with a Denominator Ending in 9 or a Series of 9s
Type 2: Fractions with a Denominator Ending in 1 or a Series of 1s
5 Checking Your Answers with Digit Sums
Using Digit Sums to Check Your Answers
Checking Multiplication Answers
Part 2: High-Speed Math Applications
Fractions with the Same Denominator
Fractions Where One Denominator Is a Factor of the Other
Addition with the Vertically and Crosswise Method
Fractions with the Same Denominator
Fractions Where One Denominator Is a Factor of the Other
Subtraction with the Vertically and Crosswise Method
The Decimal System and Place Value
Multiplying Vertically and Crosswise
Dividing a Decimal Number by a Whole Number
Dividing a Decimal Number by Another Decimal Number
Converting Percentages into Fractions
Converting Fractions into Percentages
Converting Percentages into Decimals
Finding the Percentage of a Given Quantity
Expressing One Quantity as a Percentage of Another
Percentage Increase or Decrease
Finding Squares of Numbers Ending in 5
Finding Squares of Numbers Near 50
Using the Duplex to Find the Value of a Squared Number
Combined Operations: Sums of Squares
Finding the Cubes of Two-Digit Numbers
When the Number Is Above the Base
When the Number Is Below the Base
12 Numbers to the Fourth and Fifth Powers
Calculating a Number to the Fourth Power
Calculating a Number to the Fifth Power
Square Roots of Perfect Squares
Using Duplexes to Find Square Roots
Chapter 5: Checking Your Answers with Digit Sums
Chapter 12: Numbers to the Fourth and Fifth Powers
Chapter 13: Square and Cube Roots
Chapter 5: Checking Your Answers with Digit Sums
Chapter 12: Numbers to the Fourth and Fifth Powers