In mathematics, numbers are categorized as either odd or even. Understanding the difference between odd and even numbers is an important concept in elementary math.

An even number is a number that is exactly divisible by 2. In other words, when an even number is divided by 2, the remainder is 0. The last digit of an even number is always 0, 2, 4, 6, or 8. Examples of even numbers include 2, 4, 6, 8, 10, and so on.

An odd number is a number that is not exactly divisible by 2. When an odd number is divided by 2, the remainder is always 1. The last digit of an odd number is always 1, 3, 5, 7, or 9. Examples of odd numbers include 1, 3, 5, 7, 9, and so on.

To determine whether a number is odd or even, you can simply check the last digit of the number. If the last digit is 0, 2, 4, 6, or 8, then the number is even. If the last digit is 1, 3, 5, 7, or 9, then the number is odd.

Understanding odd and even numbers is important in various mathematical operations, such as addition, subtraction, multiplication, and division. For example, when adding two even numbers, the result is always an even number. When multiplying an odd number by another odd number, the result is always an odd number.

Study GuideOdd and Even Worksheet/Answer key

Odd and Even Worksheet/Answer key

Odd and Even Worksheet/Answer key

Odd and Even Worksheet/Answer keyOdd and Even Worksheet/Answer keyEven and Odd Bubbles

Number and Operations (NCTM)

Understand numbers, ways of representing numbers, relationships among numbers, and number systems.

Count with understanding and recognize 'how many' in sets of objects.

Develop a sense of whole numbers and represent and use them in flexible ways, including relating, composing, and decomposing numbers.

Connect number words and numerals to the quantities they represent, using various physical models and representations.

Connections to the Grade 2 Focal Points (NCTM)

Algebra: Children use number patterns to extend their knowledge of properties of numbers and operations. For example, when skip counting, they build foundations for understanding multiples and factors.