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1. Natural Numbers
2. Negative Integers
3. Rational Numbers
4. Irrational Numbers

1

-1

cube root of 36

0.89

square root of 20

4

2/3

23

-2.5

-8

4(pi)

89

4.44444...

square root of 2

-15

-25

-0.252525...

19

8.979779177...

53

3.14159265359...

-4/5

-156