12/02 Review: Compare and Order Real Numbers

Front

What is a rational number?

Back

A rational number is any number that can be expressed as the quotient or fraction of two integers, where the denominator is not zero.

Front

What is an irrational number?

Back

An irrational number is a number that cannot be expressed as a simple fraction; it is a non-ending, non-repeating decimal.

Front

What is the square root of 25?

Back

The square root of 25 is 5.

Front

How do you find the area of a square?

Back

The area of a square is found by squaring the length of one of its sides (Area = side × side).

Front

If the area of a square wall is 87.5 square feet, what is the approximate length of one side?

Back

The approximate length of one side is about 9.4 feet.

Front

What symbol would you use to compare -17.5 and -√121?

Back

You would use '<' because -17.5 is less than -11.

Front

Which is greater: √2 or 5/4?

Back

√2 is greater than 5/4.

Front

What is the decimal representation of 0.211232112421125...?

Back

It is a rational number because it can be expressed as a fraction.

Front

What is the value of √12?

Back

√12 is approximately 3.464.

Front

How do you determine if a decimal is rational or irrational?

Back

If the decimal terminates or repeats, it is rational; if it does not, it is irrational.