#### What are Even Numbers?

**Even **numbers **can **be divided into **two equal groups** like 2, 4, 6, 8, and 10.

**6 **players can split into two equal groups. That’s why **6 **is an **even **number!

### What are Odd Numbers?

Every number that isn’t **even **is called **odd.**

**Odd** numbers **can’t **be divided into two equal groups. 1, 3, 5 are all odd.

### Is it Even or Odd?

🤔 How can you tell if a number **over 10 **is even or odd?

👉 Look at the Ones place.

Numbers that end in 0, 2, 4, 6, and 8 are always **even**.

Numbers that end in 1, 3, 5, 7, and 9 are always **odd**.

Think about the number 13. Is it even or odd?

Since 3 is an odd number, the number 13 is **odd,** too.

### Rules for Adding Even and Odd Numbers

All numbers follow these 4 patterns.

Even+Even=EvenExample: 2 + 2 = 4

Odd+Odd=Even1 + 3 = 4

Even+Odd=Odd2 + 3 = 5

Odd+Even=Odd1 + 2 = 3

Are these rules really true for all numbers? 🤔

Let’s try an example to see.

The rules say that adding an **odd **and an **even **number should give us an **odd **sum.

Let’s check:

Yes, the sum is odd!

### Rules for Subtraction

Just like with addition, there are 4 rules for subtraction. Take a look.

Even–Even=Even4 – 2 = 2

Odd–Odd=Even3 – 1 = 2

Even–Odd=Odd2 – 1 = 1

Odd–Even=Odd3 – 2 = 1

Let’s look at an example to see if these rules are true.

Based on the rules, subtracting two odd numbers should give us an **even **difference.

Let’s check:

Yes, we do have an **even **difference!