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The Mental Math Magician
Introduction
Chapter 1: Addition
Mix things up
Evens and odds
Sometimes subtraction is easier
Nearly doubling
Find the 5 inside
10 patterns
Work left to right
Adding time
Chapter 2: Subtraction
Basic subtraction tricks
Indirect calculation
Subtracting by factors of 10
Left to right subtraction
Make use of compliments of 100
Chapter 3: Multiplication
Multiplying from left to right
Multiplying by 9
Multiplying by larger numbers
Factoring
Multiplying by 11
Multiplying any number by 99 or a variation thereof
Duplicate first digit and the pair of second digits add up to 10
Near 100
Numbers less than 100
Multiplying 2-digit numbers
Look to an adjacent number
Multiplication via subtraction
Multiplying three numbers by two numbers
Multiplying with addition
Chapter 4: Division
How to tell if a number will go into another evenly
Single digit division
Dividing by 7
Dividing by 9
Dividing by 11
Hold numbers on your fingers
Chapter 5: Common Conversions
Length Conversion
Volume Conversion
Force Conversion
Velocity Conversion
Area Conversion
Temperature Conversion
Metric Length Conversion
Metric Density Conversion
Metric Area Conversion
Metric Volume Conversion
Metric Mass Conversion
Metric Force Conversion
Metric Stress Conversion
Metric Pressure Conversion
Metric Flow Conversion
Metric Velocity Conversion
Common decimal conversions
Chapter 6: Getting Close Enough
Estimating with addition
Estimating subtraction
Estimating division
Estimating multiplication
Estimating square roots
Chapter 7: Squares, Roots, and Cubes
Basic squares
Finding any square root
Babylonian method
Finding cubes
Five digit squares
Chapter 8: Mental Math Tricks to Impress Your Friends
Use mental math to read minds
Any number trick
Guess any number
Birth year trick
Hailstone numbers
The 99 trick
Kangaroos in Denmark
Coins in the dark
Predict the number of any credit card or barcode
Kruskal Count
Determine the day of the week of anyone’s birthday
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