How To Be A Math Genius is now available.
Learn tricks like how to calculate a date's day of the week, how to multiply two three-digit numbers, how to test divisibility, and how to divide accurate to a large number of decimal places! App Contents:

(contents shown in red are available in the app through In-App Purchases)

• Instructions and Glossary
• Multiplying Two Numbers
• Method 1: Slide Method
• Method 2: Stretch Out Method
• Method 3: Add First Method
• Method 4: Straight Down Method
• Method 5: Proportional Stretch Out Method
• Squares
• Method 1: Double First
• Method 2: Minus Half Estimate, Times Twice Estimate
• Method 3: Square Estimate First
• Almost Round Multiple Method
• 12 Multiplication Table
• Multiplying Three Numbers
• Cubes
• Method 1: Normal Three-Way Method
• Method 2: Change To Consecutive Numbers
• Method 3: Expanded Polynomial
• Divisibility Test
• Alteration Test
• Division
• Expressing Quotient as Integer and Remainder
• Expressing Quotient as Decimal
• Decimal To Fraction
• Divisibility Rules
• Days Of The Week
• Counting
• The Middle
• Mark Every 5
• Checkpoints
• Draw A Line
• Arrange Into Triangles Or Squares
• Special Cases
• Multiplying By Multiple Of 9
• Multiplying By Multiple Of 11
• Multiplying By 143
• Method 1: Divide By 7 First
• Method 2: Separate Hundreds Place
• Method 3: Multiply By 1,001 First
• Multiplying By A Number Ending In 5
• Same Tens Place, Ones Place Adds To 10
• Midpoint Divisible By 10
• Multiplying Numbers Close To 100