## Expressions, Equations, and Inequalities Represent Relationships

An expression consists of a number, variable, or a combination of numbers and variables joined by operation symbols. Expressions do not contain an equality or inequality sign. Examples of expressions are:

 3 + 4 2a 3c + 8 –7

An equation is a mathematical sentence in which two expressions are joined by an equal sign (=). Examples of equations are:

 5 + 2 = 7 3 + y = 8 12 = 4a 4 + 6 = 9 + c

An inequality is a mathematical sentence in which two expressions are joined by relations symbols such as  (not equal to), > (greater than), < (less than), (greater than or equal to),  (less than or equal to). Examples of inequalities are:

 x + 4  5 x plus 4 is not equal to 5
c  10       c is greater than or equal to 10

 5 > 1 5 is greater than 1

 10<10.5 10 is less than 10 and 5 tenths

Making Fraction Models Helps You to Write, Interpret, and Evaluate
Fraction Expressions, Inequalities, and Equations.

#### Decomposing Five into Fraction Equations

Practice Your Skill, Concept, and Knowledge Related to Numerical Expression
with the Exercises Below

Practice with Brackets, Parentheses, and Braces