Numerical Value Of An Algebraic Expression

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Numerical Value of an Algebraic Expression

Value of the expression in which we replaced each of the variables with numbers from their defined domains.

Talking about the value of a digit is a short form to refer to the numerical value associated with a digit in the case of a number that only has one digit.

Example

Consider the algebraic expression 2x + 4xy\(^{2}\) in which the variables x and y take values from the set of integers.

The numerical value of this expression, when x = 5 and y = 10, is 2010, because: 2 × 5 + 4 × 5 × 102 = 2010.

Educational Note

When a number has more than one digit, the expression “the sum of the digits of a number” should be replaced by “the sum of the numerical values associated with each digit in a number“.

Themes

• Algebra
• Arithmetic
• Geometry
• Graphs
• Logic and Mathematical Language
• Mathematicians
• Measurement
• Modes of Representation
• Operations
• Probability
• Properties
• Relations
• Statistics
• Trigonometry
• Vectors

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