8th Grade Math STAAR Practice #1

Front

What is the formula for the area of a rectangle?

Back

Area = length × width

Front

Define 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

What is the Pythagorean theorem?

Back

In a right triangle, the square of the length of the hypotenuse is equal to the sum of the squares of the lengths of the other two sides. (a² + b² = c²)

Front

How do you calculate the mean of a set of numbers?

Back

Mean = (sum of all values) / (number of values)

Front

What is the difference between the median and the mode?

Back

The median is the middle value in a data set when arranged in order, while the mode is the value that appears most frequently.

Front

What is the formula for the circumference of a circle?

Back

Circumference = 2πr, where r is the radius.

Front

Define an integer.

Back

An integer is a whole number that can be positive, negative, or zero.

Front

What is the distributive property?

Back

The distributive property states that a(b + c) = ab + ac.

Front

How do you solve for x in the equation 2x + 3 = 11?

Back

Subtract 3 from both sides: 2x = 8. Then divide by 2: x = 4.

Front

What is a ratio?

Back

A ratio is a comparison of two quantities by division.