About the Even and Odd Worksheets
A number is even when that many things can be put into pairs with none left over. It is odd when one is left without a partner. The first sheet teaches exactly that: the pictures stand two by two, so a child can see at a glance whether the last one has a partner.
Even and Odd Numbers moves from pictures to the numbers themselves. Coloring the even numbers to 20 shows the pattern: every other number, the same ones you say when you count by 2s. The sheet then points at the ones digit, which is the quick test for any number: 0, 2, 4, 6 and 8 are even, and 1, 3, 5, 7 and 9 are odd.
Even Numbers Are Doubles covers the other half of the 2nd grade standard: writing an even number as the sum of two equal numbers. Twelve is 6 + 6. An odd number cannot be split that way, which is another way to say one is left over.
For more on counting by 2s, see the skip counting worksheets. The doubles facts are on the addition worksheets, and equal rows lead on to multiplication arrays.
Frequently Asked Questions
What is an even number?
An even number can be split into pairs, or into two equal groups, with nothing left over. The even numbers are 2, 4, 6, 8, 10 and so on. Any whole number that ends in 0, 2, 4, 6 or 8 is even.
What is an odd number?
An odd number has one left over when you make pairs. The odd numbers are 1, 3, 5, 7, 9 and so on. Any whole number that ends in 1, 3, 5, 7 or 9 is odd.
How can you tell if a big number is even or odd?
Look only at the ones digit. 574 ends in 4, so it is even. 381 ends in 1, so it is odd. The other digits do not matter, because tens and hundreds can always be split into pairs.
Is zero even or odd?
Zero is even. It comes between two odd numbers, −1 and 1, and zero things can be split into two equal groups of zero with nothing left over.
What grade learns even and odd numbers?
Second grade. Children decide whether a group of up to 20 things is even or odd by pairing or counting by 2s, and they write an even number as a double, such as 14 = 7 + 7.
Do the worksheets have answer keys?
Yes. Every sheet is a two-page PDF with the answer key on the second page.
