What is a Natural Number?
A member of the set {1, 2, 3...}; the Whole Numbers (excluding 0)
Natural numbers are the numbers we use when we count things. These are the positive whole numbers starting from 1: 1, 2, 3, 4, 5, and so on. They are often called "counting numbers."
Natural numbers do not include:
- 0 (zero)
- Negative numbers
- Fractions or decimals
So while 5 and 27 are natural numbers, 0, –3, and are not.
Natural numbers are used for:
- Counting objects (like “There are 4 pencils on the desk”)
- Ordering (like “She came in 1st place”)
- Basic operations (addition, subtraction, multiplication)
When Do Students Learn About Natural Numbers?
Students begin using natural numbers as soon as they start counting. These numbers form the basis of early math learning and are used throughout elementary grades.
Preschool & Kindergarten – Early Counting
Students begin counting from 1 and use natural numbers in basic activities.
Grades 1–2 – Building Number Skills
Students use natural numbers in addition, subtraction, and simple comparisons.
Grades 3–5 – Working with Larger Numbers
Students apply natural numbers in multiplication, division, and real-world word problems.
