Evaluate Expressions

Front

If x = 3, evaluate x + 4.

Back

7

Front

Evaluate 7 + j if j = -2.

Back

5

Front

Evaluate -2x if x = 10.

Back

-20

Front

Evaluate r(r – 9) if r = 11.

Back

22

Front

Evaluate 3x + 8 if x = 2.

Back

14

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 variables with numbers.

Front

What is a variable in mathematics?

Back

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

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).

Front

What is the value of x in the expression 2x + 3 = 11?

Back

x = 4.