# Order of operations

4 videos
2 skills
If you have the expression "3 + 4 x 5", do you add the 3 to the 4 first or multiply the 4 and 5 first? To clear up confusion here, the math world has defined which operation should get priority over others. This is super important. You won't really be able to do any involved math if you don't get this clear. But don't worry, this tutorial has your back.

### Introduction to order of operations

VIDEO 9:40 minutes
This example clarifies the purpose of order of operations: to have ONE way to interpret a mathematical statement.

### Order of operations example

VIDEO 4:27 minutes
Work through a challenging order of operations example with only positive numbers.

### Order of operations example: putting it all together

VIDEO 4:36 minutes
Simplify this tricky expression using the order of operations. Expression include negative numbers and exponents.

### Order of operations: PEMDAS

VIDEO 5:20 minutes
Work through another challenging order of operations example with only positive numbers.

### Order of operations

PRACTICE PROBLEMS
Practice evaluating expressions using the order of operations.

### Order of operations with negative numbers

PRACTICE PROBLEMS
Practice evaluating expressions using the order of operations. Numbers used in these problems may be negative.