# Pre-Algebra

## Here you can learn about:

### Patterns...

 Patterns Number Patterns

### Big and small numbers ...

 1.23 Place Value Decimal Numbers Rounding Scientific Notation

### Doing Calculations ...

 Associative, Commutative and Distributive Laws Order of Operations - PEMDAS, or BODMAS Open and Closed Sentences Reciprocals Absolute Value

### Using Inequalities (less than, greater than) ...

 ≥ Equal, Greater or Less Than Comparing Numbers

### Using Exponents ...

 42 Squares and Square Roots What is an Exponent? Negative Exponents

### Factors and Multiples ...

 3 x 2 = 6 Factors and Multiples Greatest Common Factor Least Common Multiple

### Ratios and Proportions ...

 Ratios Proportions

### Fractions and Percents ...

 % Fractions Percents

### How to Estimate answers ...

 ? Introduction to Estimation Estimation Tips and Tricks Visual Estimation Estimation Games

### Some examples using Pre-Algebra ...

Here are some subjects where you can use your new skills:

 Celsius and Fahrenheit Interest