Evaluate Expressions

Front

What is an expression in mathematics?

Back

An expression is a combination of numbers, variables, and operations (like addition, subtraction, multiplication, and division) that does not have an equal sign.

Front

What should you solve first in an expression with multiple operations?

Back

You should follow the order of operations, which is Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right).

Front

If x = 14 and y = 6, what is (x + y) ÷ 2?

Back

(14 + 6) ÷ 2 = 20 ÷ 2 = 10.

Front

What is a variable in mathematics?

Back

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

Front

What does it mean to evaluate an expression?

Back

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

Front

What is the result of (8 x 2) ÷ 4?

Back

(8 x 2) ÷ 4 = 16 ÷ 4 = 4.

Front

What is the value of x if 2x = 10?

Back

x = 10 ÷ 2 = 5.

Front

What is the sum of 10 and 5?

Back

10 + 5 = 15.

Front

What is the difference between an expression and an equation?

Back

An expression does not have an equal sign, while an equation does.

Front

If Jackson has x more dollars than Indra, and Indra has $10, how much does Jackson have if x = $5?

Back

Jackson has $10 + $5 = $15.