# Properties and patterns in arithmetic

5 videos
3 skills
Math is full of properties and patterns that will keep emerging as you explore it (this is what makes math so beautiful). We begin to just scratch the surface in this tutorial! Common Core Standards: 3.OA.B.5, 3.OA.D.9

### Order doesn't matter when purely multiplying

VIDEO 5:34 minutes
Use pictures and practice problems to see commutativity in multiplication.

### Properties and patterns for multiplication

VIDEO 8:34 minutes
Change the order of numbers or decompose numbers to simplify multiplication problems.

### Properties of multiplication

PRACTICE PROBLEMS
Solve multiplication problems by changing the order of factors, grouping of factors, or by decomposing the factors.

### Introduction to even and odd

VIDEO 7:30 minutes
What are even and odd numbers? What happens when you add two even numbers? Two odd numbers? How about one odd number and one even number?

### Practice finding patterns in numbers

VIDEO 3:37 minutes
Learn how to spot a pattern in a sequence of numbers, such as 3, 6, 9, 12...

### Math patterns 1

PRACTICE PROBLEMS
Identify arithmetic patterns (including patterns in the addition table or multiplication table), and explain them using properties of operations.

### Patterns in multiplication tables practice

VIDEO 5:16 minutes
Read a multiplication table, and fill in the missing pieces.

### Patterns in multiplication tables

PRACTICE PROBLEMS
Practice discovering and explaining patterns in multiplication tables.