Evaluate Expressions

Front

What does it mean to evaluate an expression?

Back

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

Front

If x = 3, what is the value of x + 4?

Back

7

Front

If p = -6, what is the value of -10(p + 4)?

Back

20

Front

Evaluate -2x + -3y if x = 10 and y = -6.

Back

-2

Front

What is the value of 3x + 8 if x = 2?

Back

14

Front

Evaluate 7y - 3y for y = 2.

Back

8

Front

What is a variable in mathematics?

Back

A variable is a symbol, often a letter, that represents a number in mathematical expressions or equations.

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 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

If x = 5, what is the value of 2x + 3?

Back

13