Writing Expressions

Front

What is an expression in mathematics?

Back

An expression is a combination of numbers, variables, and operators (like +, -, *, /) that represents a value.

Front

How do you simplify an expression?

Back

To simplify an expression, combine like terms and perform any operations according to the order of operations (PEMDAS/BODMAS).

Front

What does it mean to evaluate an expression?

Back

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

Front

What is the order of operations?

Back

The order of operations is the rules that dictate 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 a variable in an expression?

Back

A variable is a symbol (usually a letter) that represents an unknown value in an expression.

Front

What does it mean to combine like terms?

Back

Combining like terms means to add or subtract terms that have the same variable raised to the same power.

Front

What is the difference between an equation and an expression?

Back

An equation states that two expressions are equal, while an expression does not include an equality sign.

Front

How do you write an expression for a word problem?

Back

Identify the quantities involved, determine the operations needed, and use variables to represent unknowns.

Front

What is the expression for '15 fish caught and 6 fish let go'?

Back

The expression is 15 - 6.

Front

How would you express '8 dollars plus 4 hours of work at 5 dollars each'?

Back

The expression is $8 + (4 x $5).