Equivalent Expressions

Front

What is an equivalent expression?

Back

An equivalent expression is an expression that has the same value as another expression for all values of the variables involved.

Front

What is the order of operations?

Back

The order of operations is a set of rules that determines the sequence in which calculations are performed in an expression, typically remembered by the acronym PEMDAS (Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right)).

Front

How do you evaluate an expression with variables?

Back

To evaluate an expression with variables, substitute the given values for each variable and then perform the calculations according to the order of operations.

Front

What does the expression 6h represent?

Back

The expression 6h represents the multiplication of 6 and the variable h.

Front

If n = 4, what is the value of the expression 3(n + 1)?

Back

The value of the expression 3(n + 1) when n = 4 is 15.

Front

How would you express that Perry has 17 fewer baseball cards than Pete if b represents the number of cards Pete has?

Back

The expression for the number of baseball cards Perry has is b - 17.

Front

If Neal has n baseball cards and Abby has 10 fewer, how would you express the number of baseball cards Abby has?

Back

The expression for the number of baseball cards Abby has is n - 10.

Front

What is the significance of substituting values in expressions?

Back

Substituting values in expressions allows you to evaluate the expression and find its numerical value.

Front

What is a variable in mathematics?

Back

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

Front

What is the difference between an expression and an equation?

Back

An expression is a combination of numbers, variables, and operations without an equality sign, while an equation states that two expressions are equal.