1-2/1-3 Review Algebraic Expressions

Front

What is an algebraic expression?

Back

An algebraic expression is a mathematical phrase that can include numbers, variables, and operation symbols. For example, 2x + 3 is an algebraic expression.

Front

What does it mean to evaluate an expression?

Back

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

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) - often abbreviated as PEMDAS.

Front

How do you simplify the expression 20 x 2 - (10 - 4)?

Back

First, evaluate the parentheses: 10 - 4 = 6. Then, calculate: 20 x 2 - 6 = 40 - 6 = 34.

Front

What is the result of 14 + (22 - 2)?

Back

First, evaluate the parentheses: 22 - 2 = 20. Then, calculate: 14 + 20 = 34.

Front

If c represents the number of CDs Emily has, how many CDs does Nate have if he has 6 fewer than Emily?

Back

Nate has c - 6 CDs.

Front

Evaluate the expression 2r + 1 when r = 3.

Back

Substituting r with 3 gives: 2(3) + 1 = 6 + 1 = 7.

Front

What is the solution to the expression (32 ÷ 8) + 27 - 11?

Back

First, calculate 32 ÷ 8 = 4. Then, 4 + 27 - 11 = 20.

Front

What is a variable in algebra?

Back

A variable is a symbol, usually a letter, that represents an unknown value in an expression or equation.

Front

What is a constant in an algebraic expression?

Back

A constant is a fixed value that does not change. For example, in the expression 3x + 5, the number 5 is a constant.