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Early Learners
Even and Odd Numbers
Even and Odd Numbers
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Even and odd numbers help us sort and share things in a simple way. An even number can be split into two equal groups with none left over. An odd number always has one left over when you try to make two equal groups. This matters when sharing snacks, pairing socks, lining up teams, or counting objects.
Key Facts
- Even numbers can be shared into 2 equal groups with 0 left over.
- Odd numbers make 2 equal groups with 1 left over.
- Even numbers end in 0, 2, 4, 6, or 8.
- Odd numbers end in 1, 3, 5, 7, or 9.
- Examples of even numbers: 2, 4, 6, 8, 10, 12.
- Examples of odd numbers: 1, 3, 5, 7, 9, 11.
Vocabulary
- Even number
- An even number is a number that can be split into two equal groups with none left over.
- Odd number
- An odd number is a number that has one left over when split into two equal groups.
- Pair
- A pair is a group of two things that go together.
- Left over
- Left over means something remains after making equal groups.
- Digit
- A digit is one symbol used to write a number, such as 0, 1, 2, or 3.
Common Mistakes to Avoid
- Thinking bigger numbers are always even is wrong because size does not decide even or odd. The last digit decides if a whole number is even or odd.
- Forgetting about zero is a mistake because 0 is even. It can be split into two equal groups with 0 in each group.
- Looking at the first digit is wrong because the last digit tells whether a number is even or odd. For example, 23 is odd because it ends in 3.
- Calling a number odd just because objects look messy is wrong because arrangement does not matter. Count the objects or make pairs to check.
Practice Questions
- 1 You have 14 coins. Can you split them into 2 equal groups with none left over? Is 14 even or odd?
- 2 There are 9 pizza slices on a plate. If two children share them equally, how many slices are left over? Is 9 even or odd?
- 3 A clock shows the numbers 1 through 12. Explain which clock numbers are even and how you can tell.