Number Sense

Mental math and calculation tricks

Lessons

1. Operations and Tricks

• 1.1 FOILing/LIOFing When Multiplying
• 1.2 Multiplying: The Basics
• 1.3 Standard Multiplication Tricks
• 1.4 Dividing Tricks
• 1.5 Adding and Subtracting Tricks

2. Memorizations

• 2.1 Important Numbers
• 2.2 Formulas

3. Miscellaneous Topics

• 3.1 Random Assortment of Problems
• 3.2 Changing Bases
• 3.3 Repeating Decimals
• 3.4 Modular Arithmetic
• 3.5 Fun with Factorials!
• 3.6 Basic Calculus

4. Tricks Added with 2018 Revision

• 4.1 Multiplication (2018)
• 4.2 Memorizations (2018)
• 4.3 Properties of Fibonacci Numbers
• 4.4 Additional Formulas
• 4.5 Miscellaneous Topics (2018)