Odd Numbers and Even Numbers

Odd and even numbers is one of the concepts that all students are expected to know about.

When using odd and even numbers in arithmetic, you get interesting patterns such as if you add two odd numbers, you always get an even answer.

This page is all about the basics of odd numbers and even numbers and how to identify them.

We have a lot of support worksheets, as well as practice sheets to 20 and also harder practice sheets up to 100.

By the end of 2nd grade, students are expected to identify and determine odd and even numbers up to 20.

Is zero an odd or even number?

Zero is an even number.

We can tell this because it is a multiple of 2 (it is equal to 2 x 0).

Can decimals be odd or even?

Decimal numbers cannot be odd or even.

Only whole numbers (integers) can be odd or even.

Example: 5.6 is not even or odd.

Can fractions be odd or even?

Fractions cannot be odd or even.

Only whole numbers (integers) can be odd or even.

You can refer to the numerator or denominator of a fraction as being odd or even.

Can a negative number be odd or even?

Yes. Negative whole numbers (or negative integers) are either odd or even.

If a number n is even, then so is -n. If a number n is odd, then -n is also odd.

So if we look at some lists of even and odd numbers:

• 0, 2, 4, 6, 8, 10, 12 are all even.
• This means that -2, -4, -6, -8, -10, -12 are also even.
• 1, 3, 5, 7, 9, 11, 13 are all odd.
• This means that -1, -3, -5, -7, -9, -11, -13 are all odd.

These sheets all involve circling or pairing different numbers presented visually to see whether they are odd or even.

Using visual and practical ways of pairing up objects is the best way to start learning about odd and even numbers.

If a number of objects can be paired up with none left out, then the number is even.

If the number of objects can't be paired up without leaving one of the objects out then it is odd.

These sheets involve indentifying odd and even numbers up to 20 or 100 without any visual models to support.

They have been designed as practice sheets rather than learning sheets.

These sheets have been designed for students in 3rd grade, or more able 2nd grade students.

All the sheets in this section involve identifying odd and even numbers up to 100.

We have some more challenging odd and even worksheets on our main site suitable for 3rd graders and up.

Use the link below to open math-salamanders.com in a new browser window.

The worksheets in this section are all about reading and ordering a range of 3 digit numbers.

Using the sheets in this section will help your child to:

• Read 3 digit numbers;
• Compare 3 digit numbers and put them in order.

These sheets will support your child with their place value learning.

The worksheets in this section involve counting in ones (or halves) to complete the missing numbers on the number lines.

Using the sheets will help your child to:

• count by halves up to 10;
• count by ones up to 1000;
• count by tens up to 1000;
• fill in missing numbers on a number line.

These number lines worksheets also cover counting up to 100 and 200.

Whether you are looking for a free Homeschool Math Worksheet collection, banks of useful Math resources for teaching kids, or simply wanting to improve your child's Math learning at home, there is something here at the Math Salamanders for you!

The Math Salamanders hope you enjoy using these free printable Math worksheets and all our other Math games and resources.

We welcome any comments about our site on the Facebook comments box at the bottom of every page.