Expressions released staar questions

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 for two expressions to be equivalent?

Back

Two expressions are equivalent if they have the same value for all values of the variables involved.

Front

What is prime factorization?

Back

Prime factorization is the process of expressing a number as the product of its prime factors.

Front

What is a prime number?

Back

A prime number is a natural number greater than 1 that has no positive divisors other than 1 and itself.

Front

How do you simplify the expression y ∙ 48?

Back

You can express it as (y ∙ 40) + (y ∙ 8) using the distributive property.

Front

What is the distributive property?

Back

The distributive property states that a(b + c) = ab + ac, allowing you to distribute a factor across a sum.

Front

What is the result of 30 ÷ (3 + x)?

Back

The expression remains as 30 ÷ (3 + x) and cannot be simplified further without knowing the value of x.

Front

What is the prime factorization of 90?

Back

The prime factorization of 90 is 2 ∙ 3^2 ∙ 5.

Front

How do you find the prime factorization of a number?

Back

To find the prime factorization, divide the number by the smallest prime number until you reach 1.

Front

What is the equivalent expression for (127.50 - 23.50) + 3(86.50 + 4)?

Back

The equivalent expression is 104 + 3(90.50).