ARITHMETIC
Starts from 1 and has no end
1, 2, 3, 4, 5, 6 ..................
1. counting numbers
Used for
2. ordering of things
1, 2, 3, 4, 5, 6 ..................
First, second, third, fourth......
Starts from 0 and has no end
0, 1, 2, 3, 4, 5, 6 ..................
Example
0
all natural numbers
+
.....-3, -2, -1
Integers include negative numbers, zero and positive numbers
........ -3, -2, -1, 0, 1, 2, 3, .........
Example
1, 2, 3, .......
0
Standard form of rational numbers : p q where p and q are integers and q = 0
3 , 5 , 10, 45 2 2 2 3
Example
2.333333........................ 12.5666666....................
Rational numbers are also Terminating or non terminating repeating decimal numbers
Terminating
Non terminating repeating
1.235 236.45
Numbers which are not rational are irrational numbers
Non terminating and non repeating
3.14159265359..................
2 , 3 , 5
Real numbers include all rational and irrational numbers
546.120 7.032
1.11111........................ 4560.7777777....................
7 , 11 , 5
1.41421356237.................