Pre-Algebra: Real Numbers (Classifying, Ordering, Square/Cube Roots)

Front

What are real numbers?

Back

Real numbers include all the numbers on the number line, including rational numbers (like integers and fractions) and irrational numbers (like square roots of non-perfect squares).

Front

How do you classify real numbers?

Back

Real numbers can be classified into rational numbers (can be expressed as a fraction) and irrational numbers (cannot be expressed as a fraction).

Front

What is a perfect square?

Back

A perfect square is a number that can be expressed as the square of an integer. For example, 1, 4, 9, 16, and 25 are perfect squares.

Front

What is a perfect cube?

Back

A perfect cube is a number that can be expressed as the cube of an integer. For example, 1, 8, 27, and 64 are perfect cubes.

Front

How do you find the square root of a number?

Back

The square root of a number is a value that, when multiplied by itself, gives the original number. For example, √16 = 4 because 4 x 4 = 16.

Front

How do you find the cube root of a number?

Back

The cube root of a number is a value that, when multiplied by itself three times, gives the original number. For example, ∛27 = 3 because 3 x 3 x 3 = 27.

Front

What is the square root of 225?

Back

√225 = 15.

Front

What is the square root of 256?

Back

√256 = 16.

Front

Order the following from greatest to least: √225, 81/5, √256, 15.4.

Back

81/5, √256, 15.4, √225.

Front

Order the following from least to greatest: 6.9, √37, √25, 28/4.

Back

√25, √37, 6.9, 28/4.