Bell Ringer

Front

What is a variable?

Back

A variable is a number represented by a letter.

Front

Evaluate the expression: 0.2t when t = 1.6

Back

0.32

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 the value of x in the equation x + 5 = 10?

Back

x = 5

Front

What is an expression in mathematics?

Back

An expression is a combination of numbers, variables, and operators (like +, -, *, /) without an equality sign.

Front

What is the purpose of using variables in mathematics?

Back

Variables are used to represent unknown values and to create general formulas.

Front

What is the result of multiplying a number by zero?

Back

The result is always zero.

Front

What is the order of operations in mathematics?

Back

The order of operations is Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right), often abbreviated as PEMDAS.

Front

What is the value of 3 squared?

Back

3 squared is 9.

Front

What does it mean to simplify an expression?

Back

To simplify an expression means to reduce it to its simplest form.