Expressions Review

Front

What is an expression in mathematics?

Back

An expression is a combination of numbers, variables, and operators (such as +, -, *, /) 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 the variables with numbers.

Front

What is the distributive property?

Back

The distributive property states that a(b + c) = ab + ac, meaning you can distribute a number across a sum.

Front

How do you simplify the expression 2(x + 3)?

Back

You simplify it to 2x + 6 using the distributive property.

Front

What is a variable in an expression?

Back

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

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 greatest common factor (GCF)?

Back

The GCF is the largest number that divides two or more numbers without leaving a remainder.

Front

How do you find the GCF of 16 and 24?

Back

The GCF of 16 and 24 is 8.

Front

What is the difference between an expression and an equation?

Back

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

Front

What does it mean to take 10 away from s?

Back

It means to subtract 10 from the variable s, represented as s - 10.