Solving Expressions

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

If x = 5, what is the value of 2x + 2?

Back

12

Front

Evaluate the expression 2x + x - 10 when x = 8.

Back

14

Front

If p = 9, what is p²?

Back

81

Front

If x = 2 and y = 4, what is 3x + y?

Back

10

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).

Front

What is a variable in an expression?

Back

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

Front

What does it mean to substitute a value in an expression?

Back

To substitute a value means to replace a variable in an expression with a specific number.

Front

Evaluate the expression (8 · j) - 10 when j = 7.

Back

46