Complex Numbers (ℂ) Real Numbers (ℝ) Rational Numbers (ℚ) 0.5 1/4 8.2̅ Integers (ℤ) -1 -3 -34 Whole Numbers (W) 0 Natural Numbers (ℕ) 1, 2, 3, 10... Irrational (P/I) π √5 -√7 e Imaginary (i) i 2i sqrt(-1)

Classification

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5 -2 π 2/3 i