1
Q
What are natural numbers?
A
ℕ is the set of natural numbers used for counting
ℕ = {0,1,2,3,4, … }
2
Q
What are Integer Numbers?
A
- whole numbers
- ℤ is the set of integer numbers, which include the natural numbers and their negative inverses
ℤ = {… -2, -1, 0, 1, 2 … }
3
Q
What are Rational Numbers?
A
ℚ is the set of numbers that can be written as simple fractions
4
Q
What are irrational numbers?
A
An irrational number cannot be written as a ratio of two numbers.
5
Q
What are real numbers?
A
ℝ is the set of real numbers, which includes: whole numbers, integers, rational and irrational numbers; they can be positive, negative or zero.
- R includes:1,12.41,√2, 0, 12/7, 1/8, 1.23423, 129.6
6
Q
What are ordinal numbers?
A
Ordinal numbers are used to describe the position of an object in an ordered list.
