The Number System

Front

What are natural (counting) numbers?

Back

Natural numbers are the set of positive integers starting from 1, 2, 3, and so on.

Front

What are whole numbers?

Back

Whole numbers include all natural numbers and the number 0. They are 0, 1, 2, 3, 4, ...

Front

What are integers?

Back

Integers are all whole numbers, both positive and negative, including zero. They are ..., -3, -2, -1, 0, 1, 2, 3, ...

Front

What are rational numbers?

Back

Rational numbers are numbers that can be expressed as a fraction of two integers, where the denominator is not zero. This includes proper fractions, improper fractions, mixed numbers, and terminating or repeating decimals.

Front

What is a proper fraction?

Back

A proper fraction is a fraction where the numerator is less than the denominator, such as 1/2 or 3/4.

Front

What is an improper fraction?

Back

An improper fraction is a fraction where the numerator is greater than or equal to the denominator, such as 5/4 or 3/3.

Front

What is a mixed number?

Back

A mixed number is a whole number combined with a proper fraction, such as 2 1/2.

Front

What are terminating decimals?

Back

Terminating decimals are decimal numbers that have a finite number of digits after the decimal point, such as 0.75 or 2.5.

Front

What are repeating decimals?

Back

Repeating decimals are decimal numbers that have one or more digits that repeat infinitely, such as 0.333... or 1.666... .

Front

What is the relationship between whole numbers and natural numbers?

Back

All natural numbers are whole numbers, but whole numbers also include zero.