# Arithmetic

- Alternate Methods for doing Arithmetic (I think these are easier)
- Fun, Easy Arithmetic and Patterns
- Absolute Value
- Area
- Circles--formula for circumference and area; examples
- Decimals
- Dividing by Zero
- Divisibility Tests
- Factors, Prime Numbers, and Prime Factorization of a Number
- Fractions
- Greatest Common Factor (GCF) of 2 or more numbers?(factors of numbers are also called divisors)
- Least Common Multiple
- Order of Operations
- Percents
- Place Value and?Rounding?of Whole Numbers
- Positive and Negative Numbers?(and Integers)
- Prime Numbers and Prime Factorization of a Number
- Proportions
- Volume
- ZERO: How to Multiply and Divide by Zero