TOPIC 3 - 6R - Numeric and Algebraic Expressions

Front

What is a numeric expression?

Back

A numeric expression is a mathematical phrase that includes numbers and operations (such as addition, subtraction, multiplication, and division) but does not contain any variables.

Front

What is an algebraic expression?

Back

An algebraic expression is a mathematical phrase that includes numbers, variables, and operations. For example, 3x + 5 is an algebraic expression.

Front

Evaluate the expression: 5 + 3 x 2.

Back

11

Front

What does it mean to evaluate an expression?

Back

To evaluate an expression means to calculate its value by substituting numbers for the variables and performing the operations.

Front

Evaluate the expression: 4y - 3 when y = 2.

Back

5

Front

What is the order of operations?

Back

The order of operations is a set of rules that determines the sequence in which calculations are performed: Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right). Often remembered by the acronym PEMDAS.

Front

Write the expression for the total cost of 2 books at $15 each and a $10 magazine.

Back

2b + 10, where b = 15.

Front

Evaluate the expression: 9 - 2(3 + 1).

Back

1

Front

What is a coefficient in an algebraic expression?

Back

A coefficient is a numerical factor that multiplies a variable in an algebraic expression. For example, in 4x, 4 is the coefficient.

Front

What is a variable in mathematics?

Back

A variable is a symbol (often a letter) that represents an unknown value in an expression or equation.