Answer: see below
Explanation:
Natural Numbers: 1, 2, 3, ..... ∞
Whole Numbers: 0, 1, 2, 3, ..... ∞
Integers: -∞ ..... -3, -2, -1, 0, 1, 2, 3, ..... ∞
Rationals: Includes fractions that terminate or repeat
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Irrationals: Numbers that do not terminate or repeat (this includes square roots that cannot be simplified)
1) 4: Natural, Whole, Integer, Rational
2)
Irrational
3) π : Irrational
4) -6: Integer, Rational
5) 0: Whole, Integer, Rational
6)
→ repeating decimal: Rational
7)
→ simplifies to -0.2: Rational
8)
→ does not simplify: Irrational