Relationship established between two numbers, two sets, two terms or two expressions.

### Symbols

To compare mathematical objects based on an order relation, we usually use the symbols <, >, =, ≤ and ≥.

- The symbol < is read as “is less than”

Example : 5 < 10. - The symbol > is read as “is greater than”

Example : 10 > 5. - The symbol = is read as “is equal to”

Example : 5 = 3 + 2. - The symbol ≤ is read as “is less than or equal to”

Examples : 5 ≤ 10,*x*+ 7 ≤ 10. - The symbol ≥ is read as “is greater than or equal to”

Examples : 10 ≥ 5,*x*+ 7 ≥ 10.

### Examples

- Here is a list of 3 numbers: 45, 46, 47. We can say that the
**greatest**number is 47 and the**least**number is 45. - Here are four sets of sheep: A (34 sheep), B (45 sheep), C (67 sheep) and D (45 sheep). The set that has the
**most**sheep is set C. The set that has the**fewest**sheep is set A. There are**as many**sheep in set B as there are in set D. - When we have 2 or more line segments, we can determine which is
**longest**and which is**shortest**.