Unit 1: Real Number System Review

Front

What is the definition of a real number?

Back

A real number is any value that represents a quantity along a continuous line, including all rational and irrational numbers.

Front

What are rational numbers?

Back

Rational numbers are numbers that can be expressed as the quotient or fraction of two integers, where the denominator is not zero.

Front

What are irrational numbers?

Back

Irrational numbers are numbers that cannot be expressed as a simple fraction; they have non-repeating, non-terminating decimal expansions.

Front

What is the square root of a number?

Back

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. Formula: Area = side × side.

Front

What is scientific notation?

Back

Scientific notation is a way of expressing numbers that are too large or too small to be conveniently written in decimal form, using powers of ten.

Front

How do you convert a number to scientific notation?

Back

To convert a number to scientific notation, move the decimal point to create a number between 1 and 10, then multiply by 10 raised to the number of places moved.

Front

What is the greatest common factor (GCF)?

Back

The GCF of two or more numbers is the largest number that divides all of them without leaving a remainder.

Front

What is the least common multiple (LCM)?

Back

The LCM of two or more numbers is the smallest number that is a multiple of all the numbers.

Front

What is the difference between a whole number and an integer?

Back

Whole numbers are non-negative numbers (0, 1, 2, ...), while integers include all whole numbers and their negative counterparts (..., -2, -1, 0, 1, 2, ...).