Front

What is an expression in mathematics?

Back

An expression is a combination of numbers, variables, and operators (like +, -, *, /) that represents a value.

Front

What does it mean to evaluate an expression?

Back

To evaluate an expression means to calculate its value by substituting the variables with given numbers.

Front

Evaluate 2a + 4b if a = 10 and b = 6.

Back

44

Front

Evaluate 21 + 7x when x = 2.

Back

35

Front

Evaluate 3(x + 4) when x = 2.

Back

18

Front

Evaluate n^3 if n = 4.

Back

64

Front

Evaluate p + 3 when p = 8.

Back

11

Front

What is a variable in an expression?

Back

A variable is a symbol (like x or y) that represents an unknown value.

Front

What is a coefficient in an expression?

Back

A coefficient is a number that is multiplied by a variable in an expression.

Front

What is the order of operations in mathematics?

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).