A statement that one quantity is smaller in size than another quantity.
In math, “less than” is a way to compare two numbers and show that one number is smaller than the other. We use the symbol < to represent “less than.”
For example:
3 < 7 means “3 is less than 7.”
We can also say: “7 is greater than 3,” using the opposite symbol >.
Think of the symbol like a hungry alligator that always wants to eat the bigger number. The small side points to the smaller number, and the wide side opens to the larger one.
We use less than when comparing:
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Scores on a test
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Heights or distances
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Quantities like how many apples someone has
Understanding comparisons helps students reason about number values and solve everyday problems.
When Do Students Learn About Less Than?
Students start learning about less than as part of number sense and comparison skills.
Grades K–2 – Comparing Numbers
Students use the < symbol to compare numbers and understand which values are smaller.
Grades 3+ – Applying Comparisons in Math
Students apply comparison symbols when working with number lines, word problems, and inequalities.
